86007978 has 48 divisors (see below), whose sum is σ = 213997056. Its totient is φ = 24455520.

The previous prime is 86007959. The next prime is 86008009. The reversal of 86007978 is 87970068.

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, 26568 + ... + 29628.

It is an arithmetic number, because the mean of its divisors is an integer number (4458272).

Almost surely, 2^86007978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86007978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106998528).

86007978 is an abundant number, since it is smaller than the sum of its proper divisors (127989078).

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

86007978 is a wasteful number, since it uses less digits than its factorization.

86007978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299 (or 3296 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 86007978 is about 9274.0486304526. The cubic root of 86007978 is about 441.4141450205.

The spelling of 86007978 in words is "eighty-six million, seven thousand, nine hundred seventy-eight".