87299892 has 18 divisors (see below), whose sum is σ = 220674818. Its totient is φ = 29099952.

The previous prime is 87299869. The next prime is 87299893. The reversal of 87299892 is 29899278.

It can be written as a sum of positive squares in only one way, i.e., 83283876 + 4016016 = 9126^2 + 2004^2 .

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

It is a super-2 number, since 2×87299892² = 15242542286423328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87299893) 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, 1212463 + ... + 1212534.

Almost surely, 2^87299892 is an apocalyptic number.

It is an amenable number.

87299892 is an abundant number, since it is smaller than the sum of its proper divisors (133374926).

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

87299892 is a wasteful number, since it uses less digits than its factorization.

87299892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425007 (or 2425002 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 87299892 is about 9343.4411219850. The cubic root of 87299892 is about 443.6133107529.

The spelling of 87299892 in words is "eighty-seven million, two hundred ninety-nine thousand, eight hundred ninety-two".