280500057 has 8 divisors (see below), whose sum is σ = 415555680. Its totient is φ = 187000020.

The previous prime is 280500053. The next prime is 280500061. The reversal of 280500057 is 750005082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (280500053) and next prime (280500061).

It is not a de Polignac number, because 280500057 - 2² = 280500053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 10388891 = 280500057 / (2 + 8 + 0 + 5 + 0 + 0 + 0 + 5 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 280500057.

It is not an unprimeable number, because it can be changed into a prime (280500053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5194419 + ... + 5194472.

It is an arithmetic number, because the mean of its divisors is an integer number (51944460).

Almost surely, 2^280500057 is an apocalyptic number.

280500057 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

280500057 is a deficient number, since it is larger than the sum of its proper divisors (135055623).

280500057 is a wasteful number, since it uses less digits than its factorization.

280500057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10388900 (or 10388894 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 280500057 is about 16748.1359261262. The cubic root of 280500057 is about 654.6024874704.

The spelling of 280500057 in words is "two hundred eighty million, five hundred thousand, fifty-seven".