74204228728 has 32 divisors (see below), whose sum is σ = 161704137600. Its totient is φ = 31262797152.

The previous prime is 74204228713. The next prime is 74204228759. The reversal of 74204228728 is 82782240247.

It is a super-2 number, since 2×74204228728² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11226150 + ... + 11232757.

It is an arithmetic number, because the mean of its divisors is an integer number (5053254300).

Almost surely, 2^74204228728 is an apocalyptic number.

It is an amenable number.

74204228728 is an abundant number, since it is smaller than the sum of its proper divisors (87499908872).

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

74204228728 is a wasteful number, since it uses less digits than its factorization.

74204228728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22458979 (or 22458975 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 46.

The spelling of 74204228728 in words is "seventy-four billion, two hundred four million, two hundred twenty-eight thousand, seven hundred twenty-eight".