76818990 has 32 divisors (see below), whose sum is σ = 186592896. Its totient is φ = 20237600.

The previous prime is 76818979. The next prime is 76818997. The reversal of 76818990 is 9981867.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76818997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12936 + ... + 17915.

It is an arithmetic number, because the mean of its divisors is an integer number (5831028).

Almost surely, 2^76818990 is an apocalyptic number.

76818990 is an abundant number, since it is smaller than the sum of its proper divisors (109773906).

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

76818990 is a wasteful number, since it uses less digits than its factorization.

76818990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30944.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 76818990 is about 8764.6443167992. The cubic root of 76818990 is about 425.0984593105.

The spelling of 76818990 in words is "seventy-six million, eight hundred eighteen thousand, nine hundred ninety".