77940764 has 24 divisors (see below), whose sum is σ = 149794176. Its totient is φ = 35190000.

The previous prime is 77940763. The next prime is 77940769. The reversal of 77940764 is 46704977.

It is a super-3 number, since 3×77940764³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77940763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 779 + ... + 12509.

It is an arithmetic number, because the mean of its divisors is an integer number (6241424).

Almost surely, 2^77940764 is an apocalyptic number.

It is an amenable number.

77940764 is a deficient number, since it is larger than the sum of its proper divisors (71853412).

77940764 is a wasteful number, since it uses less digits than its factorization.

77940764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11897 (or 11895 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 77940764 is about 8828.4066512593. The cubic root of 77940764 is about 427.1576804319.

The spelling of 77940764 in words is "seventy-seven million, nine hundred forty thousand, seven hundred sixty-four".