83564690 has 32 divisors (see below), whose sum is σ = 173746944. Its totient is φ = 28599040.

The previous prime is 83564669. The next prime is 83564749. The reversal of 83564690 is 9646538.

It is a super-2 number, since 2×83564690² = 13966114829592200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20474 + ... + 24213.

It is an arithmetic number, because the mean of its divisors is an integer number (5429592).

Almost surely, 2^83564690 is an apocalyptic number.

83564690 is an abundant number, since it is smaller than the sum of its proper divisors (90182254).

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

83564690 is a wasteful number, since it uses less digits than its factorization.

83564690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44722.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 83564690 is about 9141.3724352528. The cubic root of 83564690 is about 437.1940761993.

The spelling of 83564690 in words is "eighty-three million, five hundred sixty-four thousand, six hundred ninety".