74557028 has 72 divisors (see below), whose sum is σ = 169255800. Its totient is φ = 28449792.

The previous prime is 74557009. The next prime is 74557031. The reversal of 74557028 is 82075547.

It can be written as a sum of positive squares in 4 ways, for example, as 906304 + 73650724 = 952^2 + 8582^2 .

It is a super-3 number, since 3×74557028³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74556982 and 74557000.

It is a congruent number.

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, 73388 + ... + 74396.

It is an arithmetic number, because the mean of its divisors is an integer number (2350775).

Almost surely, 2^74557028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74557028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84627900).

74557028 is an abundant number, since it is smaller than the sum of its proper divisors (94698772).

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

74557028 is a wasteful number, since it uses less digits than its factorization.

74557028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 74557028 is about 8634.6411622024. The cubic root of 74557028 is about 420.8844325582.

The spelling of 74557028 in words is "seventy-four million, five hundred fifty-seven thousand, twenty-eight".