74777772 has 12 divisors (see below), whose sum is σ = 174481496. Its totient is φ = 24925920.

The previous prime is 74777743. The next prime is 74777783. The reversal of 74777772 is 27777747.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 3115729 + ... + 3115752.

Almost surely, 2^74777772 is an apocalyptic number.

It is an amenable number.

74777772 is an abundant number, since it is smaller than the sum of its proper divisors (99703724).

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

74777772 is a wasteful number, since it uses less digits than its factorization.

74777772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6231488 (or 6231486 counting only the distinct ones).

The product of its digits is 941192, while the sum is 48.

The square root of 74777772 is about 8647.4141799731. The cubic root of 74777772 is about 421.2993997956.

The spelling of 74777772 in words is "seventy-four million, seven hundred seventy-seven thousand, seven hundred seventy-two".