86991048 has 24 divisors (see below), whose sum is σ = 235600950. Its totient is φ = 28996992.

The previous prime is 86991043. The next prime is 86991061. The reversal of 86991048 is 84019968.

It can be written as a sum of positive squares in only one way, i.e., 64352484 + 22638564 = 8022^2 + 4758^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 86990994 and 86991012.

It is not an unprimeable number, because it can be changed into a prime (86991041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 604033 + ... + 604176.

Almost surely, 2^86991048 is an apocalyptic number.

It is an amenable number.

86991048 is an abundant number, since it is smaller than the sum of its proper divisors (148609902).

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

86991048 is a wasteful number, since it uses less digits than its factorization.

86991048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208221 (or 1208214 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 86991048 is about 9326.8991631731. The cubic root of 86991048 is about 443.0895636640.

The spelling of 86991048 in words is "eighty-six million, nine hundred ninety-one thousand, forty-eight".