86250978 has 54 divisors (see below), whose sum is σ = 206447787. Its totient is φ = 26005320.

The previous prime is 86250977. The next prime is 86251001. The reversal of 86250978 is 87905268.

It can be written as a sum of positive squares in only one way, i.e., 43125489 + 43125489 = 6567^2 + 6567^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6567.

It is not an unprimeable number, because it can be changed into a prime (86250977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 433323 + ... + 433521.

Almost surely, 2^86250978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86250978

86250978 is an abundant number, since it is smaller than the sum of its proper divisors (120196809).

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

86250978 is a wasteful number, since it uses less digits than its factorization.

86250978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 86250978 is about 9287.1404641041. The cubic root of 86250978 is about 441.8294660949.

The spelling of 86250978 in words is "eighty-six million, two hundred fifty thousand, nine hundred seventy-eight".