188142399 has 16 divisors (see below), whose sum is σ = 285529440. Its totient is φ = 122368320.

The previous prime is 188142377. The next prime is 188142407. The reversal of 188142399 is 993241881.

It is not a de Polignac number, because 188142399 - 2⁷ = 188142271 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188152399) 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, 83872 + ... + 86085.

It is an arithmetic number, because the mean of its divisors is an integer number (17845590).

Almost surely, 2^188142399 is an apocalyptic number.

188142399 is a deficient number, since it is larger than the sum of its proper divisors (97387041).

188142399 is a wasteful number, since it uses less digits than its factorization.

188142399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170007 (or 170001 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 188142399 is about 13716.5009751029. The cubic root of 188142399 is about 573.0100324441.

The spelling of 188142399 in words is "one hundred eighty-eight million, one hundred forty-two thousand, three hundred ninety-nine".