77490512 has 40 divisors (see below), whose sum is σ = 172414560. Its totient is φ = 33367680.

The previous prime is 77490499. The next prime is 77490521. The reversal of 77490512 is 21509477.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8243 + ... + 14930.

It is an arithmetic number, because the mean of its divisors is an integer number (4310364).

Almost surely, 2^77490512 is an apocalyptic number.

It is an amenable number.

77490512 is an abundant number, since it is smaller than the sum of its proper divisors (94924048).

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

77490512 is a wasteful number, since it uses less digits than its factorization.

77490512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23211 (or 23205 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 77490512 is about 8802.8695321469. The cubic root of 77490512 is about 426.3335496678. Note that the first 3 decimals are identical.

Adding to 77490512 its reverse (21509477), we get a palindrome (98999989).

The spelling of 77490512 in words is "seventy-seven million, four hundred ninety thousand, five hundred twelve".