188426431 has 8 divisors (see below), whose sum is σ = 192671424. Its totient is φ = 184191360.

The previous prime is 188426429. The next prime is 188426461. The reversal of 188426431 is 134624881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 188426431 - 2¹ = 188426429 is a prime.

It is a super-2 number, since 2×188426431² = 71009039798795522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188426411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46611 + ... + 50491.

It is an arithmetic number, because the mean of its divisors is an integer number (24083928).

Almost surely, 2^188426431 is an apocalyptic number.

188426431 is a deficient number, since it is larger than the sum of its proper divisors (4244993).

188426431 is a wasteful number, since it uses less digits than its factorization.

188426431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961.

The product of its digits is 36864, while the sum is 37.

The square root of 188426431 is about 13726.8507313222. The cubic root of 188426431 is about 573.2982385300.

The spelling of 188426431 in words is "one hundred eighty-eight million, four hundred twenty-six thousand, four hundred thirty-one".