87398644 has 12 divisors (see below), whose sum is σ = 153887104. Its totient is φ = 43430904.

The previous prime is 87398639. The next prime is 87398659. The reversal of 87398644 is 44689378.

It is a congruent number.

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, 66372 + ... + 67675.

Almost surely, 2^87398644 is an apocalyptic number.

It is an amenable number.

87398644 is a deficient number, since it is larger than the sum of its proper divisors (66488460).

87398644 is a wasteful number, since it uses less digits than its factorization.

87398644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134214 (or 134212 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The square root of 87398644 is about 9348.7241910327. The cubic root of 87398644 is about 443.7805167402.

The spelling of 87398644 in words is "eighty-seven million, three hundred ninety-eight thousand, six hundred forty-four".