189438072 has 32 divisors (see below), whose sum is σ = 501454800. Its totient is φ = 59431424.

The previous prime is 189438071. The next prime is 189438077. The reversal of 189438072 is 270834981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189438071) by changing a digit.

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, 231747 + ... + 232562.

Almost surely, 2^189438072 is an apocalyptic number.

189438072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189438072 is an abundant number, since it is smaller than the sum of its proper divisors (312016728).

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

189438072 is a wasteful number, since it uses less digits than its factorization.

189438072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464335 (or 464331 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 189438072 is about 13763.6503878877. The cubic root of 189438072 is about 574.3223997894.

The spelling of 189438072 in words is "one hundred eighty-nine million, four hundred thirty-eight thousand, seventy-two".