86999040 has 192 divisors, whose sum is σ = 306703800. Its totient is φ = 22806528.

The previous prime is 86998999. The next prime is 86999057. The reversal of 86999040 is 4099968.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1474531 + ... + 1474589.

Almost surely, 2^86999040 is an apocalyptic number.

86999040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86999040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153351900).

86999040 is an abundant number, since it is smaller than the sum of its proper divisors (219704760).

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

86999040 is an equidigital number, since it uses as much as digits as its factorization.

86999040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 86999040 is about 9327.3275915452. The cubic root of 86999040 is about 443.1031323527.

The spelling of 86999040 in words is "eighty-six million, nine hundred ninety-nine thousand, forty".