77234280 has 32 divisors (see below), whose sum is σ = 231703200. Its totient is φ = 20595776.

The previous prime is 77234249. The next prime is 77234291. The reversal of 77234280 is 8243277.

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, 321690 + ... + 321929.

It is an arithmetic number, because the mean of its divisors is an integer number (7240725).

Almost surely, 2^77234280 is an apocalyptic number.

It is an amenable number.

77234280 is an abundant number, since it is smaller than the sum of its proper divisors (154468920).

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

77234280 is a wasteful number, since it uses less digits than its factorization.

77234280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643633 (or 643629 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 77234280 is about 8788.3035905685. The cubic root of 77234280 is about 425.8631225041.

The spelling of 77234280 in words is "seventy-seven million, two hundred thirty-four thousand, two hundred eighty".