76906638 has 32 divisors (see below), whose sum is σ = 172972800. Its totient is φ = 25325208.

The previous prime is 76906619. The next prime is 76906639. The reversal of 76906638 is 83660967.

76906638 is a `hidden beast` number, since 7 + 6 + 9 + 0 + 6 + 638 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 76906593 and 76906602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76906639) 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, 4098 + ... + 13061.

It is an arithmetic number, because the mean of its divisors is an integer number (5405400).

Almost surely, 2^76906638 is an apocalyptic number.

76906638 is an abundant number, since it is smaller than the sum of its proper divisors (96066162).

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

76906638 is a wasteful number, since it uses less digits than its factorization.

76906638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17253 (or 17247 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 76906638 is about 8769.6429801902. The cubic root of 76906638 is about 425.2600724233.

The spelling of 76906638 in words is "seventy-six million, nine hundred six thousand, six hundred thirty-eight".