280748941 has 4 divisors (see below), whose sum is σ = 306271584. Its totient is φ = 255226300.

The previous prime is 280748939. The next prime is 280748957. The reversal of 280748941 is 149847082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 280748941 - 2¹ = 280748939 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280742941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12761305 + ... + 12761326.

It is an arithmetic number, because the mean of its divisors is an integer number (76567896).

Almost surely, 2^280748941 is an apocalyptic number.

It is an amenable number.

280748941 is a deficient number, since it is larger than the sum of its proper divisors (25522643).

280748941 is a wasteful number, since it uses less digits than its factorization.

280748941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25522642.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 280748941 is about 16755.5644787038. The cubic root of 280748941 is about 654.7960369541.

The spelling of 280748941 in words is "two hundred eighty million, seven hundred forty-eight thousand, nine hundred forty-one".