77864260 has 12 divisors (see below), whose sum is σ = 163514988. Its totient is φ = 31145696.

The previous prime is 77864249. The next prime is 77864273. The reversal of 77864260 is 6246877.

It can be written as a sum of positive squares in 2 ways, for example, as 61591104 + 16273156 = 7848^2 + 4034^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946587 + ... + 1946626.

It is an arithmetic number, because the mean of its divisors is an integer number (13626249).

Almost surely, 2^77864260 is an apocalyptic number.

It is an amenable number.

77864260 is an abundant number, since it is smaller than the sum of its proper divisors (85650728).

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

77864260 is a wasteful number, since it uses less digits than its factorization.

77864260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893222 (or 3893220 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 77864260 is about 8824.0727558197. The cubic root of 77864260 is about 427.0178735340.

The spelling of 77864260 in words is "seventy-seven million, eight hundred sixty-four thousand, two hundred sixty".