109749520 has 40 divisors (see below), whose sum is σ = 255805056. Its totient is φ = 43790208.

The previous prime is 109749503. The next prime is 109749547. The reversal of 109749520 is 25947901.

109749520 is a nontrivial binomial coefficient, being equal to C(14816, 2).

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 109749520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35559 + ... + 38521.

Almost surely, 2^109749520 is an apocalyptic number.

109749520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109749520 is the 14815-th triangular number and also the 7408-th hexagonal number.

109749520 is the 4939-th centered nonagonal number.

It is an amenable number.

109749520 is an abundant number, since it is smaller than the sum of its proper divisors (146055536).

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

109749520 is a wasteful number, since it uses less digits than its factorization.

109749520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3439 (or 3433 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 109749520 is about 10476.1405107034. The cubic root of 109749520 is about 478.7780260233.

The spelling of 109749520 in words is "one hundred nine million, seven hundred forty-nine thousand, five hundred twenty".