109202640 has 40 divisors (see below), whose sum is σ = 338528928. Its totient is φ = 29120640.

The previous prime is 109202623. The next prime is 109202647. The reversal of 109202640 is 46202901.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 109202640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109202647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227266 + ... + 227745.

Almost surely, 2^109202640 is an apocalyptic number.

109202640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109202640 is an abundant number, since it is smaller than the sum of its proper divisors (229326288).

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

109202640 is a wasteful number, since it uses less digits than its factorization.

109202640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455027 (or 455021 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 109202640 is about 10450.0066985624. The cubic root of 109202640 is about 477.9814538535.

The spelling of 109202640 in words is "one hundred nine million, two hundred two thousand, six hundred forty".