87818620 has 24 divisors (see below), whose sum is σ = 185530464. Its totient is φ = 34915776.

The previous prime is 87818611. The next prime is 87818657. The reversal of 87818620 is 2681878.

It is a super-2 number, since 2×87818620² = 15424220037408800, which contains 22 as substring.

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, 9807 + ... + 16486.

It is an arithmetic number, because the mean of its divisors is an integer number (7730436).

Almost surely, 2^87818620 is an apocalyptic number.

It is an amenable number.

87818620 is an abundant number, since it is smaller than the sum of its proper divisors (97711844).

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

87818620 is a wasteful number, since it uses less digits than its factorization.

87818620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26469 (or 26467 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 87818620 is about 9371.1589464697. The cubic root of 87818620 is about 444.4902128330.

The spelling of 87818620 in words is "eighty-seven million, eight hundred eighteen thousand, six hundred twenty".