76987764 has 72 divisors (see below), whose sum is σ = 235505088. Its totient is φ = 20701440.

The previous prime is 76987751. The next prime is 76987769. The reversal of 76987764 is 46778967.

It is a self number, because there is not a number n which added to its sum of digits gives 76987764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76987769) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4702 + ... + 13269.

It is an arithmetic number, because the mean of its divisors is an integer number (3270904).

Almost surely, 2^76987764 is an apocalyptic number.

It is an amenable number.

76987764 is an abundant number, since it is smaller than the sum of its proper divisors (158517324).

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

76987764 is a wasteful number, since it uses less digits than its factorization.

76987764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18005 (or 18000 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 54.

The square root of 76987764 is about 8774.2671488849. The cubic root of 76987764 is about 425.4095503090.

The spelling of 76987764 in words is "seventy-six million, nine hundred eighty-seven thousand, seven hundred sixty-four".