77477480 has 32 divisors (see below), whose sum is σ = 174666240. Its totient is φ = 30930240.

The previous prime is 77477441. The next prime is 77477509. The reversal of 77477480 is 8477477.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22685 + ... + 25875.

It is an arithmetic number, because the mean of its divisors is an integer number (5458320).

Almost surely, 2^77477480 is an apocalyptic number.

It is an amenable number.

77477480 is an abundant number, since it is smaller than the sum of its proper divisors (97188760).

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

77477480 is a wasteful number, since it uses less digits than its factorization.

77477480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809 (or 3805 counting only the distinct ones).

The product of its (nonzero) digits is 307328, while the sum is 44.

The square root of 77477480 is about 8802.1292878485. The cubic root of 77477480 is about 426.3096487188.

The spelling of 77477480 in words is "seventy-seven million, four hundred seventy-seven thousand, four hundred eighty".