77365380 has 24 divisors (see below), whose sum is σ = 216623232. Its totient is φ = 20630752.

The previous prime is 77365349. The next prime is 77365381. The reversal of 77365380 is 8356377.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (77365381) 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, 644652 + ... + 644771.

It is an arithmetic number, because the mean of its divisors is an integer number (9025968).

Almost surely, 2^77365380 is an apocalyptic number.

It is an amenable number.

77365380 is an abundant number, since it is smaller than the sum of its proper divisors (139257852).

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

77365380 is a wasteful number, since it uses less digits than its factorization.

77365380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289435 (or 1289433 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 77365380 is about 8795.7592054353. The cubic root of 77365380 is about 426.1039443064.

The spelling of 77365380 in words is "seventy-seven million, three hundred sixty-five thousand, three hundred eighty".