86387994 has 96 divisors (see below), whose sum is σ = 235437696. Its totient is φ = 22239360.

The previous prime is 86387993. The next prime is 86388011. The reversal of 86387994 is 49978368.

It is a self number, because there is not a number n which added to its sum of digits gives 86387994.

It is not an unprimeable number, because it can be changed into a prime (86387993) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217404 + ... + 217800.

It is an arithmetic number, because the mean of its divisors is an integer number (2452476).

Almost surely, 2^86387994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86387994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117718848).

86387994 is an abundant number, since it is smaller than the sum of its proper divisors (149049702).

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

86387994 is a wasteful number, since it uses less digits than its factorization.

86387994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 577 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 86387994 is about 9294.5141884877. The cubic root of 86387994 is about 442.0633018132.

The spelling of 86387994 in words is "eighty-six million, three hundred eighty-seven thousand, nine hundred ninety-four".