189656040 has 64 divisors (see below), whose sum is σ = 650252160. Its totient is φ = 43349760.

The previous prime is 189656039. The next prime is 189656041. The reversal of 189656040 is 40656981.

It is an interprime number because it is at equal distance from previous prime (189656039) and next prime (189656041).

It is a self number, because there is not a number n which added to its sum of digits gives 189656040.

It is not an unprimeable number, because it can be changed into a prime (189656041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112051 + ... + 113730.

It is an arithmetic number, because the mean of its divisors is an integer number (10160190).

Almost surely, 2^189656040 is an apocalyptic number.

189656040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189656040 is an abundant number, since it is smaller than the sum of its proper divisors (460596120).

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

189656040 is a wasteful number, since it uses less digits than its factorization.

189656040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225802 (or 225798 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 189656040 is about 13771.5663597138. The cubic root of 189656040 is about 574.5425877060.

The spelling of 189656040 in words is "one hundred eighty-nine million, six hundred fifty-six thousand, forty".