87767892 has 18 divisors (see below), whose sum is σ = 221857818. Its totient is φ = 29255952.

The previous prime is 87767887. The next prime is 87767893. The reversal of 87767892 is 29876778.

It can be written as a sum of positive squares in only one way, i.e., 55890576 + 31877316 = 7476^2 + 5646^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×87767892² = 15406405732247328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87767893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1218963 + ... + 1219034.

Almost surely, 2^87767892 is an apocalyptic number.

It is an amenable number.

87767892 is an abundant number, since it is smaller than the sum of its proper divisors (134089926).

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

87767892 is a wasteful number, since it uses less digits than its factorization.

87767892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438007 (or 2438002 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 87767892 is about 9368.4519532311. The cubic root of 87767892 is about 444.4046104762.

The spelling of 87767892 in words is "eighty-seven million, seven hundred sixty-seven thousand, eight hundred ninety-two".