109780638 has 24 divisors (see below), whose sum is σ = 241337544. Its totient is φ = 33266640.

The previous prime is 109780607. The next prime is 109780669. The reversal of 109780638 is 836087901.

It is an interprime number because it is at equal distance from previous prime (109780607) and next prime (109780669).

It is a self number, because there is not a number n which added to its sum of digits gives 109780638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74881 + ... + 76332.

It is an arithmetic number, because the mean of its divisors is an integer number (10055731).

Almost surely, 2^109780638 is an apocalyptic number.

109780638 is an abundant number, since it is smaller than the sum of its proper divisors (131556906).

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

109780638 is a wasteful number, since it uses less digits than its factorization.

109780638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151240 (or 151229 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 109780638 is about 10477.6255897985. The cubic root of 109780638 is about 478.8232721034.

The spelling of 109780638 in words is "one hundred nine million, seven hundred eighty thousand, six hundred thirty-eight".