86583978 has 40 divisors (see below), whose sum is σ = 208941348. Its totient is φ = 26640576.

The previous prime is 86583953. The next prime is 86583997. The reversal of 86583978 is 87938568.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 86434209 + 149769 = 9297^2 + 387^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18451 + ... + 22662.

Almost surely, 2^86583978 is an apocalyptic number.

86583978 is an abundant number, since it is smaller than the sum of its proper divisors (122357370).

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

86583978 is a wasteful number, since it uses less digits than its factorization.

86583978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41140 (or 41131 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 86583978 is about 9305.0512088865. The cubic root of 86583978 is about 442.3973447592.

The spelling of 86583978 in words is "eighty-six million, five hundred eighty-three thousand, nine hundred seventy-eight".