86990904 has 384 divisors, whose sum is σ = 339655680. Its totient is φ = 19353600.

The previous prime is 86990881. The next prime is 86990927. The reversal of 86990904 is 40909968.

It is an interprime number because it is at equal distance from previous prime (86990881) and next prime (86990927).

It is a self number, because there is not a number n which added to its sum of digits gives 86990904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1225189 + ... + 1225259.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^86990904 is an apocalyptic number.

86990904 is a gapful number since it is divisible by the number (84) 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 86990904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169827840).

86990904 is an abundant number, since it is smaller than the sum of its proper divisors (252664776).

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

86990904 is a wasteful number, since it uses less digits than its factorization.

86990904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 124 counting only the distinct ones).

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

The square root of 86990904 is about 9326.8914435625. The cubic root of 86990904 is about 443.0893191755.

The spelling of 86990904 in words is "eighty-six million, nine hundred ninety thousand, nine hundred four".