74157028 has 72 divisors (see below), whose sum is σ = 151559352. Its totient is φ = 31680000.

The previous prime is 74157001. The next prime is 74157059. The reversal of 74157028 is 82075147.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25826724 + 48330304 = 5082^2 + 6952^2 .

It is a junction number, because it is equal to n+sod(n) for n = 74156984 and 74157002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 734178 + ... + 734278.

It is an arithmetic number, because the mean of its divisors is an integer number (2104991).

Almost surely, 2^74157028 is an apocalyptic number.

It is an amenable number.

74157028 is an abundant number, since it is smaller than the sum of its proper divisors (77402324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74157028 is a wasteful number, since it uses less digits than its factorization.

74157028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 74157028 is about 8611.4474973723. The cubic root of 74157028 is about 420.1303979086.

The spelling of 74157028 in words is "seventy-four million, one hundred fifty-seven thousand, twenty-eight".