188561142 has 128 divisors (see below), whose sum is σ = 528768000. Its totient is φ = 48384000.

The previous prime is 188561141. The next prime is 188561147. The reversal of 188561142 is 241165881.

188561142 is a `hidden beast` number, since 1 + 88 + 561 + 14 + 2 = 666.

It is a super-3 number, since 3×188561142³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 188561097 and 188561106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188561141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 419734 + ... + 420182.

It is an arithmetic number, because the mean of its divisors is an integer number (4131000).

Almost surely, 2^188561142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188561142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264384000).

188561142 is an abundant number, since it is smaller than the sum of its proper divisors (340206858).

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

188561142 is a wasteful number, since it uses less digits than its factorization.

188561142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 573 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 188561142 is about 13731.7566975242. The cubic root of 188561142 is about 573.4348279695.

The spelling of 188561142 in words is "one hundred eighty-eight million, five hundred sixty-one thousand, one hundred forty-two".