87940225 has 12 divisors (see below), whose sum is σ = 109681596. Its totient is φ = 69942080.

The previous prime is 87940217. The next prime is 87940241. The reversal of 87940225 is 52204978.

It can be written as a sum of positive squares in 6 ways, for example, as 13307904 + 74632321 = 3648^2 + 8639^2 .

It is not a de Polignac number, because 87940225 - 2³ = 87940217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5842 + ... + 14491.

It is an arithmetic number, because the mean of its divisors is an integer number (9140133).

Almost surely, 2^87940225 is an apocalyptic number.

It is an amenable number.

87940225 is a deficient number, since it is larger than the sum of its proper divisors (21741371).

87940225 is a wasteful number, since it uses less digits than its factorization.

87940225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20516 (or 20511 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 87940225 is about 9377.6449602232. The cubic root of 87940225 is about 444.6952843856.

The spelling of 87940225 in words is "eighty-seven million, nine hundred forty thousand, two hundred twenty-five".