189542412 has 18 divisors (see below), whose sum is σ = 479121188. Its totient is φ = 63180792.

The previous prime is 189542407. The next prime is 189542413. The reversal of 189542412 is 214245981.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5265067 = 189542412 / (1 + 8 + 9 + 5 + 4 + 2 + 4 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (189542413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2632498 + ... + 2632569.

Almost surely, 2^189542412 is an apocalyptic number.

189542412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189542412 is an abundant number, since it is smaller than the sum of its proper divisors (289578776).

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

189542412 is a wasteful number, since it uses less digits than its factorization.

189542412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5265077 (or 5265072 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 189542412 is about 13767.4402849622. The cubic root of 189542412 is about 574.4278235126.

The spelling of 189542412 in words is "one hundred eighty-nine million, five hundred forty-two thousand, four hundred twelve".