86998440 has 64 divisors (see below), whose sum is σ = 265939200. Its totient is φ = 22760192.

The previous prime is 86998423. The next prime is 86998447. The reversal of 86998440 is 4489968.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 86998440.

It is not an unprimeable number, because it can be changed into a prime (86998447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480 + ... + 13199.

It is an arithmetic number, because the mean of its divisors is an integer number (4155300).

Almost surely, 2^86998440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86998440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132969600).

86998440 is an abundant number, since it is smaller than the sum of its proper divisors (178940760).

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

86998440 is a wasteful number, since it uses less digits than its factorization.

86998440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13746 (or 13742 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 86998440 is about 9327.2954279362. The cubic root of 86998440 is about 443.1021137113.

The spelling of 86998440 in words is "eighty-six million, nine hundred ninety-eight thousand, four hundred forty".