189140457 has 16 divisors (see below), whose sum is σ = 278599680. Its totient is φ = 113178000.

The previous prime is 189140449. The next prime is 189140491. The reversal of 189140457 is 754041981.

189140457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189140457 - 2³ = 189140449 is a prime.

It is a super-2 number, since 2×189140457² = 71548224948337698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189140437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33669 + ... + 38882.

It is an arithmetic number, because the mean of its divisors is an integer number (17412480).

Almost surely, 2^189140457 is an apocalyptic number.

It is an amenable number.

189140457 is a deficient number, since it is larger than the sum of its proper divisors (89459223).

189140457 is a wasteful number, since it uses less digits than its factorization.

189140457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72644.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 189140457 is about 13752.8345078387. The cubic root of 189140457 is about 574.0214807810.

The spelling of 189140457 in words is "one hundred eighty-nine million, one hundred forty thousand, four hundred fifty-seven".