189129240 has 48 divisors (see below), whose sum is σ = 614671200. Its totient is φ = 50434368.

The previous prime is 189129223. The next prime is 189129251. The reversal of 189129240 is 42921981.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 189129195 and 189129204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262320 + ... + 263039.

It is an arithmetic number, because the mean of its divisors is an integer number (12805650).

Almost surely, 2^189129240 is an apocalyptic number.

189129240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189129240 is an abundant number, since it is smaller than the sum of its proper divisors (425541960).

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

189129240 is a wasteful number, since it uses less digits than its factorization.

189129240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525376 (or 525369 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 189129240 is about 13752.4266949510. The cubic root of 189129240 is about 574.0101330832.

The spelling of 189129240 in words is "one hundred eighty-nine million, one hundred twenty-nine thousand, two hundred forty".