109778445 has 48 divisors (see below), whose sum is σ = 223367040. Its totient is φ = 48822912.

The previous prime is 109778413. The next prime is 109778477. The reversal of 109778445 is 544877901.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (109778413) and next prime (109778477).

It is not a de Polignac number, because 109778445 - 2⁵ = 109778413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 109778445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6946 + ... + 16364.

It is an arithmetic number, because the mean of its divisors is an integer number (4653480).

Almost surely, 2^109778445 is an apocalyptic number.

109778445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109778445 is an abundant number, since it is smaller than the sum of its proper divisors (113588595).

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

109778445 is a wasteful number, since it uses less digits than its factorization.

109778445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474 (or 9471 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 109778445 is about 10477.5209377028. The cubic root of 109778445 is about 478.8200837257.

The spelling of 109778445 in words is "one hundred nine million, seven hundred seventy-eight thousand, four hundred forty-five".