87040818 has 30 divisors (see below), whose sum is σ = 195302349. Its totient is φ = 28974024.

The previous prime is 87040813. The next prime is 87040819. The reversal of 87040818 is 81804078.

It can be written as a sum of positive squares in 2 ways, for example, as 56205009 + 30835809 = 7497^2 + 5553^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6597.

It is a super-2 number, since 2×87040818² = 15152207996218248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87040813) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 118380 + ... + 119112.

Almost surely, 2^87040818 is an apocalyptic number.

87040818 is an abundant number, since it is smaller than the sum of its proper divisors (108261531).

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

87040818 is an frugal number, since it uses more digits than its factorization.

87040818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 87040818 is about 9329.5668709753. The cubic root of 87040818 is about 443.1740488450.

The spelling of 87040818 in words is "eighty-seven million, forty thousand, eight hundred eighteen".