109899840 has 56 divisors (see below), whose sum is σ = 348935040. Its totient is φ = 29306368.

The previous prime is 109899827. The next prime is 109899841. The reversal of 109899840 is 48998901.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 109899840.

It is not an unprimeable number, because it can be changed into a prime (109899841) 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, 56280 + ... + 58199.

Almost surely, 2^109899840 is an apocalyptic number.

109899840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109899840 is an abundant number, since it is smaller than the sum of its proper divisors (239035200).

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

109899840 is a wasteful number, since it uses less digits than its factorization.

109899840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114499 (or 114489 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 109899840 is about 10483.3124536093. The cubic root of 109899840 is about 478.9965146923.

The spelling of 109899840 in words is "one hundred nine million, eight hundred ninety-nine thousand, eight hundred forty".