77264880 has 320 divisors, whose sum is σ = 309408768. Its totient is φ = 15482880.

The previous prime is 77264861. The next prime is 77264893. The reversal of 77264880 is 8846277.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 683704 + ... + 683816.

Almost surely, 2^77264880 is an apocalyptic number.

77264880 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77264880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154704384).

77264880 is an abundant number, since it is smaller than the sum of its proper divisors (232143888).

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

77264880 is a wasteful number, since it uses less digits than its factorization.

77264880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 77264880 is about 8790.0443684887. The cubic root of 77264880 is about 425.9193569936.

The spelling of 77264880 in words is "seventy-seven million, two hundred sixty-four thousand, eight hundred eighty".