188081842 has 32 divisors (see below), whose sum is σ = 317202480. Its totient is φ = 83066880.

The previous prime is 188081821. The next prime is 188081843. The reversal of 188081842 is 248180881.

It can be written as a sum of positive squares in 8 ways, for example, as 24216241 + 163865601 = 4921^2 + 12801^2 .

It is a super-2 number, since 2×188081842² = 70749558580225928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 188081795 and 188081804.

It is not an unprimeable number, because it can be changed into a prime (188081843) 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, 54834 + ... + 58162.

Almost surely, 2^188081842 is an apocalyptic number.

188081842 is a deficient number, since it is larger than the sum of its proper divisors (129120638).

188081842 is a wasteful number, since it uses less digits than its factorization.

188081842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438.

The product of its (nonzero) digits is 32768, while the sum is 40.

The square root of 188081842 is about 13714.2933467241. The cubic root of 188081842 is about 572.9485480005.

The spelling of 188081842 in words is "one hundred eighty-eight million, eighty-one thousand, eight hundred forty-two".