86961720 has 64 divisors (see below), whose sum is σ = 269892000. Its totient is φ = 22389248.

The previous prime is 86961713. The next prime is 86961731. The reversal of 86961720 is 2716968.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9015 + ... + 15974.

Almost surely, 2^86961720 is an apocalyptic number.

It is an amenable number.

86961720 is an abundant number, since it is smaller than the sum of its proper divisors (182930280).

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

86961720 is a wasteful number, since it uses less digits than its factorization.

86961720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25032 (or 25028 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 86961720 is about 9325.3268039249. The cubic root of 86961720 is about 443.0397639369.

The spelling of 86961720 in words is "eighty-six million, nine hundred sixty-one thousand, seven hundred twenty".