87225638 has 16 divisors (see below), whose sum is σ = 133039680. Its totient is φ = 42883776.

The previous prime is 87225587. The next prime is 87225641. The reversal of 87225638 is 83652278.

It is a junction number, because it is equal to n+sod(n) for n = 87225595 and 87225604.

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, 42770 + ... + 44762.

It is an arithmetic number, because the mean of its divisors is an integer number (8314980).

Almost surely, 2^87225638 is an apocalyptic number.

87225638 is a deficient number, since it is larger than the sum of its proper divisors (45814042).

87225638 is a wasteful number, since it uses less digits than its factorization.

87225638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351.

The product of its digits is 161280, while the sum is 41.

The square root of 87225638 is about 9339.4666871294. The cubic root of 87225638 is about 443.4875014855.

The spelling of 87225638 in words is "eighty-seven million, two hundred twenty-five thousand, six hundred thirty-eight".