189374840 has 32 divisors (see below), whose sum is σ = 428490000. Its totient is φ = 75323904.

The previous prime is 189374839. The next prime is 189374863. The reversal of 189374840 is 48473981.

189374840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 189374791 and 189374800.

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, 6065 + ... + 20384.

Almost surely, 2^189374840 is an apocalyptic number.

189374840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189374840 is an abundant number, since it is smaller than the sum of its proper divisors (239115160).

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

189374840 is a wasteful number, since it uses less digits than its factorization.

189374840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26639 (or 26635 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 189374840 is about 13761.3531311423. The cubic root of 189374840 is about 574.2584921934.

The spelling of 189374840 in words is "one hundred eighty-nine million, three hundred seventy-four thousand, eight hundred forty".