86642290 has 48 divisors (see below), whose sum is σ = 182775744. Its totient is φ = 29484000.

The previous prime is 86642279. The next prime is 86642293. The reversal of 86642290 is 9224668.

It is not an unprimeable number, because it can be changed into a prime (86642293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73405 + ... + 74575.

It is an arithmetic number, because the mean of its divisors is an integer number (3807828).

Almost surely, 2^86642290 is an apocalyptic number.

86642290 is an abundant number, since it is smaller than the sum of its proper divisors (96133454).

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

86642290 is a wasteful number, since it uses less digits than its factorization.

86642290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343 (or 1336 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 86642290 is about 9308.1840334192. The cubic root of 86642290 is about 442.4966367434.

The spelling of 86642290 in words is "eighty-six million, six hundred forty-two thousand, two hundred ninety".