87040172 has 12 divisors (see below), whose sum is σ = 153291600. Its totient is φ = 43242576.

The previous prime is 87040141. The next prime is 87040201. The reversal of 87040172 is 27104078.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68672 + ... + 69927.

It is an arithmetic number, because the mean of its divisors is an integer number (12774300).

Almost surely, 2^87040172 is an apocalyptic number.

It is an amenable number.

87040172 is a deficient number, since it is larger than the sum of its proper divisors (66251428).

87040172 is a wasteful number, since it uses less digits than its factorization.

87040172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138760 (or 138758 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 87040172 is about 9329.5322497969. The cubic root of 87040172 is about 443.1729524584.

The spelling of 87040172 in words is "eighty-seven million, forty thousand, one hundred seventy-two".