77769394 has 32 divisors (see below), whose sum is σ = 129548160. Its totient is φ = 34848000.

The previous prime is 77769383. The next prime is 77769397. The reversal of 77769394 is 49396777.

It is not an unprimeable number, because it can be changed into a prime (77769397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87834 + ... + 88714.

It is an arithmetic number, because the mean of its divisors is an integer number (4048380).

Almost surely, 2^77769394 is an apocalyptic number.

77769394 is a deficient number, since it is larger than the sum of its proper divisors (51778766).

77769394 is a wasteful number, since it uses less digits than its factorization.

77769394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026.

The product of its digits is 2000376, while the sum is 52.

The square root of 77769394 is about 8818.6957085501. The cubic root of 77769394 is about 426.8443838383.

The spelling of 77769394 in words is "seventy-seven million, seven hundred sixty-nine thousand, three hundred ninety-four".