86423904 has 144 divisors (see below), whose sum is σ = 283675392. Its totient is φ = 24447744.

The previous prime is 86423899. The next prime is 86423923. The reversal of 86423904 is 40932468.

It is a happy number.

86423904 is a `hidden beast` number, since 8 + 642 + 3 + 9 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328477 + ... + 328739.

It is an arithmetic number, because the mean of its divisors is an integer number (1969968).

Almost surely, 2^86423904 is an apocalyptic number.

86423904 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 86423904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141837696).

86423904 is an abundant number, since it is smaller than the sum of its proper divisors (197251488).

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

86423904 is a wasteful number, since it uses less digits than its factorization.

86423904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 86423904 is about 9296.4457724444. The cubic root of 86423904 is about 442.1245460261.

The spelling of 86423904 in words is "eighty-six million, four hundred twenty-three thousand, nine hundred four".