87137638 has 16 divisors (see below), whose sum is σ = 150165504. Its totient is φ = 37148040.

The previous prime is 87137581. The next prime is 87137641. The reversal of 87137638 is 83673178.

It is a junction number, because it is equal to n+sod(n) for n = 87137594 and 87137603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13620 + ... + 18967.

It is an arithmetic number, because the mean of its divisors is an integer number (9385344).

Almost surely, 2^87137638 is an apocalyptic number.

87137638 is a deficient number, since it is larger than the sum of its proper divisors (63027866).

87137638 is a wasteful number, since it uses less digits than its factorization.

87137638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32787.

The product of its digits is 169344, while the sum is 43.

The square root of 87137638 is about 9334.7543084968. The cubic root of 87137638 is about 443.3383097538.

The spelling of 87137638 in words is "eighty-seven million, one hundred thirty-seven thousand, six hundred thirty-eight".