189107440 has 40 divisors (see below), whose sum is σ = 453863808. Its totient is φ = 73201920.

The previous prime is 189107411. The next prime is 189107453. The reversal of 189107440 is 44701981.

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

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 189107396 and 189107405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35647 + ... + 40606.

Almost surely, 2^189107440 is an apocalyptic number.

189107440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189107440 is an abundant number, since it is smaller than the sum of its proper divisors (264756368).

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

189107440 is a wasteful number, since it uses less digits than its factorization.

189107440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76297 (or 76291 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 189107440 is about 13751.6340847188. The cubic root of 189107440 is about 573.9880777914.

The spelling of 189107440 in words is "one hundred eighty-nine million, one hundred seven thousand, four hundred forty".