86978994 has 16 divisors (see below), whose sum is σ = 179569920. Its totient is φ = 28057680.

The previous prime is 86978977. The next prime is 86979023. The reversal of 86978994 is 49987968.

It is a Curzon 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, 233629 + ... + 234000.

It is an arithmetic number, because the mean of its divisors is an integer number (11223120).

Almost surely, 2^86978994 is an apocalyptic number.

86978994 is an abundant number, since it is smaller than the sum of its proper divisors (92590926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86978994 is a wasteful number, since it uses less digits than its factorization.

86978994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467665.

The product of its digits is 7838208, while the sum is 60.

The square root of 86978994 is about 9326.2529453152. The cubic root of 86978994 is about 443.0690970052.

The spelling of 86978994 in words is "eighty-six million, nine hundred seventy-eight thousand, nine hundred ninety-four".