189157380 has 24 divisors (see below), whose sum is σ = 529640832. Its totient is φ = 50441952.

The previous prime is 189157373. The next prime is 189157411. The reversal of 189157380 is 83751981.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1576252 + ... + 1576371.

It is an arithmetic number, because the mean of its divisors is an integer number (22068368).

Almost surely, 2^189157380 is an apocalyptic number.

189157380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189157380 is an abundant number, since it is smaller than the sum of its proper divisors (340483452).

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

189157380 is a wasteful number, since it uses less digits than its factorization.

189157380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152635 (or 3152633 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 189157380 is about 13753.4497490630. The cubic root of 189157380 is about 574.0386001147.

The spelling of 189157380 in words is "one hundred eighty-nine million, one hundred fifty-seven thousand, three hundred eighty".