86820090 has 32 divisors (see below), whose sum is σ = 238135680. Its totient is φ = 19844544.

The previous prime is 86820077. The next prime is 86820103. The reversal of 86820090 is 9002868.

It is an interprime number because it is at equal distance from previous prime (86820077) and next prime (86820103).

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, 206505 + ... + 206924.

It is an arithmetic number, because the mean of its divisors is an integer number (7441740).

Almost surely, 2^86820090 is an apocalyptic number.

86820090 is an abundant number, since it is smaller than the sum of its proper divisors (151315590).

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

86820090 is a wasteful number, since it uses less digits than its factorization.

86820090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413446.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 86820090 is about 9317.7298737407. The cubic root of 86820090 is about 442.7991146901.

The spelling of 86820090 in words is "eighty-six million, eight hundred twenty thousand, ninety".