77804434 has 8 divisors (see below), whose sum is σ = 116761788. Its totient is φ = 38883840.

The previous prime is 77804431. The next prime is 77804453. The reversal of 77804434 is 43440877.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 76475025 + 1329409 = 8745^2 + 1153^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 77804393 and 77804402.

It is not an unprimeable number, because it can be changed into a prime (77804431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3087 + ... + 12850.

Almost surely, 2^77804434 is an apocalyptic number.

77804434 is a deficient number, since it is larger than the sum of its proper divisors (38957354).

77804434 is a wasteful number, since it uses less digits than its factorization.

77804434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18380.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 77804434 is about 8820.6821731655. The cubic root of 77804434 is about 426.9084809538.

The spelling of 77804434 in words is "seventy-seven million, eight hundred four thousand, four hundred thirty-four".