87861994 has 16 divisors (see below), whose sum is σ = 144314496. Its totient is φ = 39787200.

The previous prime is 87861989. The next prime is 87862007. The reversal of 87861994 is 49916878.

It is a happy 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, 1407 + ... + 13330.

It is an arithmetic number, because the mean of its divisors is an integer number (9019656).

Almost surely, 2^87861994 is an apocalyptic number.

87861994 is a deficient number, since it is larger than the sum of its proper divisors (56452502).

87861994 is a wasteful number, since it uses less digits than its factorization.

87861994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15021.

The product of its digits is 870912, while the sum is 52.

The square root of 87861994 is about 9373.4728889564. The cubic root of 87861994 is about 444.5633793411.

Subtracting from 87861994 its reverse (49916878), we obtain a triangular number (37945116 = T₈₇₁₁).

The spelling of 87861994 in words is "eighty-seven million, eight hundred sixty-one thousand, nine hundred ninety-four".