86770620 has 72 divisors (see below), whose sum is σ = 264648384. Its totient is φ = 23011968.

The previous prime is 86770613. The next prime is 86770667. The reversal of 86770620 is 2607768.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34237 + ... + 36683.

It is an arithmetic number, because the mean of its divisors is an integer number (3675672).

Almost surely, 2^86770620 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 86770620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132324192).

86770620 is an abundant number, since it is smaller than the sum of its proper divisors (177877764).

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

86770620 is a wasteful number, since it uses less digits than its factorization.

86770620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659 (or 2654 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 86770620 is about 9315.0748789261. The cubic root of 86770620 is about 442.7149965478.

The spelling of 86770620 in words is "eighty-six million, seven hundred seventy thousand, six hundred twenty".