83807818 has 16 divisors (see below), whose sum is σ = 129991680. Its totient is φ = 40482000.

The previous prime is 83807809. The next prime is 83807819. The reversal of 83807818 is 81870838.

It is a super-2 number, since 2×83807818² = 14047500715842248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83807819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63768 + ... + 65068.

It is an arithmetic number, because the mean of its divisors is an integer number (8124480).

Almost surely, 2^83807818 is an apocalyptic number.

83807818 is a deficient number, since it is larger than the sum of its proper divisors (46183862).

83807818 is a wasteful number, since it uses less digits than its factorization.

83807818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373.

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 83807818 is about 9154.6609986389. The cubic root of 83807818 is about 437.6176650044.

The spelling of 83807818 in words is "eighty-three million, eight hundred seven thousand, eight hundred eighteen".