74747428 has 24 divisors (see below), whose sum is σ = 153143424. Its totient is φ = 31252800.

The previous prime is 74747371. The next prime is 74747473. The reversal of 74747428 is 82474747.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31408 + ... + 33703.

It is an arithmetic number, because the mean of its divisors is an integer number (6380976).

Almost surely, 2^74747428 is an apocalyptic number.

It is an amenable number.

74747428 is an abundant number, since it is smaller than the sum of its proper divisors (78395996).

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

74747428 is a wasteful number, since it uses less digits than its factorization.

74747428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65163 (or 65161 counting only the distinct ones).

The product of its digits is 351232, while the sum is 43.

The square root of 74747428 is about 8645.6594890153. The cubic root of 74747428 is about 421.2424058600.

The spelling of 74747428 in words is "seventy-four million, seven hundred forty-seven thousand, four hundred twenty-eight".