86969820 has 96 divisors (see below), whose sum is σ = 283627008. Its totient is φ = 19498752.

The previous prime is 86969797. The next prime is 86969833. The reversal of 86969820 is 2896968.

It is a self number, because there is not a number n which added to its sum of digits gives 86969820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20307 + ... + 24213.

It is an arithmetic number, because the mean of its divisors is an integer number (2954448).

Almost surely, 2^86969820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86969820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141813504).

86969820 is an abundant number, since it is smaller than the sum of its proper divisors (196657188).

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

86969820 is a wasteful number, since it uses less digits than its factorization.

86969820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979 (or 3977 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 86969820 is about 9325.7610949455. The cubic root of 86969820 is about 443.0535190722.

The spelling of 86969820 in words is "eighty-six million, nine hundred sixty-nine thousand, eight hundred twenty".