77490372 has 12 divisors (see below), whose sum is σ = 180810896. Its totient is φ = 25830120.

The previous prime is 77490319. The next prime is 77490461. The reversal of 77490372 is 27309477.

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

It is a self number, because there is not a number n which added to its sum of digits gives 77490372.

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, 3228754 + ... + 3228777.

Almost surely, 2^77490372 is an apocalyptic number.

It is an amenable number.

77490372 is an abundant number, since it is smaller than the sum of its proper divisors (103320524).

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

77490372 is a wasteful number, since it uses less digits than its factorization.

77490372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6457538 (or 6457536 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 39.

The square root of 77490372 is about 8802.8615801908. The cubic root of 77490372 is about 426.3332929192. Note that the first 3 decimals are identical.

The spelling of 77490372 in words is "seventy-seven million, four hundred ninety thousand, three hundred seventy-two".