109805904 has 60 divisors (see below), whose sum is σ = 330948436. Its totient is φ = 33785856.

The previous prime is 109805897. The next prime is 109805909. The reversal of 109805904 is 409508901.

It can be written as a sum of positive squares in 2 ways, for example, as 65610000 + 44195904 = 8100^2 + 6648^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109805909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27457 + ... + 31200.

Almost surely, 2^109805904 is an apocalyptic number.

It is an amenable number.

109805904 is an abundant number, since it is smaller than the sum of its proper divisors (221142532).

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

109805904 is a wasteful number, since it uses less digits than its factorization.

109805904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58684 (or 58675 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 109805904 is about 10478.8312325373. The cubic root of 109805904 is about 478.8600029910.

The spelling of 109805904 in words is "one hundred nine million, eight hundred five thousand, nine hundred four".