109920402 has 80 divisors (see below), whose sum is σ = 263450880. Its totient is φ = 34134912.

The previous prime is 109920361. The next prime is 109920403. The reversal of 109920402 is 204029901.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (109920403) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 459799 + ... + 460037.

It is an arithmetic number, because the mean of its divisors is an integer number (3293136).

Almost surely, 2^109920402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109920402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131725440).

109920402 is an abundant number, since it is smaller than the sum of its proper divisors (153530478).

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

109920402 is a wasteful number, since it uses less digits than its factorization.

109920402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 109920402 is about 10484.2931092182. The cubic root of 109920402 is about 479.0263858676.

The spelling of 109920402 in words is "one hundred nine million, nine hundred twenty thousand, four hundred two".