77264840 has 32 divisors (see below), whose sum is σ = 174432960. Its totient is φ = 30801600.

The previous prime is 77264819. The next prime is 77264861. The reversal of 77264840 is 4846277.

It is an interprime number because it is at equal distance from previous prime (77264819) and next prime (77264861).

It is a junction number, because it is equal to n+sod(n) for n = 77264794 and 77264803.

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, 9335 + ... + 15545.

It is an arithmetic number, because the mean of its divisors is an integer number (5451030).

Almost surely, 2^77264840 is an apocalyptic number.

It is an amenable number.

77264840 is an abundant number, since it is smaller than the sum of its proper divisors (97168120).

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

77264840 is a wasteful number, since it uses less digits than its factorization.

77264840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6533 (or 6529 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 77264840 is about 8790.0420931870. The cubic root of 77264840 is about 425.9192834942.

The spelling of 77264840 in words is "seventy-seven million, two hundred sixty-four thousand, eight hundred forty".