189531040 has 48 divisors (see below), whose sum is σ = 467244288. Its totient is φ = 72514816.

The previous prime is 189531029. The next prime is 189531047. The reversal of 189531040 is 40135981.

It is a junction number, because it is equal to n+sod(n) for n = 189530993 and 189531011.

It is not an unprimeable number, because it can be changed into a prime (189531047) 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, 22072 + ... + 29431.

It is an arithmetic number, because the mean of its divisors is an integer number (9734256).

Almost surely, 2^189531040 is an apocalyptic number.

189531040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189531040 is an abundant number, since it is smaller than the sum of its proper divisors (277713248).

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

189531040 is a wasteful number, since it uses less digits than its factorization.

189531040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51541 (or 51533 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 189531040 is about 13767.0272753416. The cubic root of 189531040 is about 574.4163352767.

The spelling of 189531040 in words is "one hundred eighty-nine million, five hundred thirty-one thousand, forty".