101808690 has 16 divisors (see below), whose sum is σ = 244340928. Its totient is φ = 27148976.

The previous prime is 101808667. The next prime is 101808697. The reversal of 101808690 is 96808101.

It is a super-2 number, since 2×101808690² = 20730018719032200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (101808697) 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, 1696782 + ... + 1696841.

It is an arithmetic number, because the mean of its divisors is an integer number (15271308).

Almost surely, 2^101808690 is an apocalyptic number.

101808690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101808690 is an abundant number, since it is smaller than the sum of its proper divisors (142532238).

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

101808690 is a wasteful number, since it uses less digits than its factorization.

101808690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393633.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 101808690 is about 10090.0292368258. The cubic root of 101808690 is about 466.9405778578.

The spelling of 101808690 in words is "one hundred one million, eight hundred eight thousand, six hundred ninety".