74255728 has 20 divisors (see below), whose sum is σ = 152334000. Its totient is φ = 34943744.

The previous prime is 74255719. The next prime is 74255729. The reversal of 74255728 is 82755247.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74255729) 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, 136228 + ... + 136771.

It is an arithmetic number, because the mean of its divisors is an integer number (7616700).

Almost surely, 2^74255728 is an apocalyptic number.

It is an amenable number.

74255728 is an abundant number, since it is smaller than the sum of its proper divisors (78078272).

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

74255728 is a wasteful number, since it uses less digits than its factorization.

74255728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273024 (or 273018 counting only the distinct ones).

The product of its digits is 156800, while the sum is 40.

The square root of 74255728 is about 8617.1763356682. The cubic root of 74255728 is about 420.3167074559.

The spelling of 74255728 in words is "seventy-four million, two hundred fifty-five thousand, seven hundred twenty-eight".