86021638 has 8 divisors (see below), whose sum is σ = 129186288. Its totient is φ = 42959544.

The previous prime is 86021623. The next prime is 86021653. The reversal of 86021638 is 83612068.

It is an interprime number because it is at equal distance from previous prime (86021623) and next prime (86021653).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23506 + ... + 26917.

It is an arithmetic number, because the mean of its divisors is an integer number (16148286).

Almost surely, 2^86021638 is an apocalyptic number.

86021638 is a deficient number, since it is larger than the sum of its proper divisors (43164650).

86021638 is a wasteful number, since it uses less digits than its factorization.

86021638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51278.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 86021638 is about 9274.7850648950. The cubic root of 86021638 is about 441.4375126125.

The spelling of 86021638 in words is "eighty-six million, twenty-one thousand, six hundred thirty-eight".