86957820 has 48 divisors (see below), whose sum is σ = 270537120. Its totient is φ = 23188608.

The previous prime is 86957803. The next prime is 86957831. The reversal of 86957820 is 2875968.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 79977 + ... + 81056.

It is an arithmetic number, because the mean of its divisors is an integer number (5636190).

Almost surely, 2^86957820 is an apocalyptic number.

It is an amenable number.

86957820 is an abundant number, since it is smaller than the sum of its proper divisors (183579300).

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

86957820 is a wasteful number, since it uses less digits than its factorization.

86957820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161051 (or 161043 counting only the distinct ones).

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

The square root of 86957820 is about 9325.1176936272. The cubic root of 86957820 is about 443.0331407893.

The spelling of 86957820 in words is "eighty-six million, nine hundred fifty-seven thousand, eight hundred twenty".