86542020 has 72 divisors (see below), whose sum is σ = 272248704. Its totient is φ = 23076576.

The previous prime is 86541989. The next prime is 86542037. The reversal of 86542020 is 2024568.

86542020 is a `hidden beast` number, since 8 + 654 + 2 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 4044 + ... + 13763.

It is an arithmetic number, because the mean of its divisors is an integer number (3781232).

Almost surely, 2^86542020 is an apocalyptic number.

It is an amenable number.

86542020 is an abundant number, since it is smaller than the sum of its proper divisors (185706684).

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

86542020 is a wasteful number, since it uses less digits than its factorization.

86542020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17831 (or 17817 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 86542020 is about 9302.7963537852. The cubic root of 86542020 is about 442.3258723098.

Adding to 86542020 its reverse (2024568), we get a palindrome (88566588).

The spelling of 86542020 in words is "eighty-six million, five hundred forty-two thousand, twenty".