77620492 has 12 divisors (see below), whose sum is σ = 141741936. Its totient is φ = 37122800.

The previous prime is 77620489. The next prime is 77620511. The reversal of 77620492 is 29402677.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421759 + ... + 421942.

It is an arithmetic number, because the mean of its divisors is an integer number (11811828).

Almost surely, 2^77620492 is an apocalyptic number.

It is an amenable number.

77620492 is a deficient number, since it is larger than the sum of its proper divisors (64121444).

77620492 is a wasteful number, since it uses less digits than its factorization.

77620492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843728 (or 843726 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 77620492 is about 8810.2492586759. The cubic root of 77620492 is about 426.5717890708.

The spelling of 77620492 in words is "seventy-seven million, six hundred twenty thousand, four hundred ninety-two".