71428850 has 24 divisors (see below), whose sum is σ = 133134708. Its totient is φ = 28512000.

The previous prime is 71428829. The next prime is 71428853. The reversal of 71428850 is 5882417.

It can be written as a sum of positive squares in 6 ways, for example, as 35200489 + 36228361 = 5933^2 + 6019^2 .

It is a super-2 number, since 2×71428850² = 10204161224645000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71428850.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71428853) 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 11 ways as a sum of consecutive naturals, for example, 28862 + ... + 31238.

Almost surely, 2^71428850 is an apocalyptic number.

71428850 is a deficient number, since it is larger than the sum of its proper divisors (61705858).

71428850 is a wasteful number, since it uses less digits than its factorization.

71428850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990 (or 2985 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 71428850 is about 8451.5590277771. The cubic root of 71428850 is about 414.9138060697.

The spelling of 71428850 in words is "seventy-one million, four hundred twenty-eight thousand, eight hundred fifty".