187042538 has 8 divisors (see below), whose sum is σ = 282612132. Its totient is φ = 92838496.

The previous prime is 187042529. The next prime is 187042543. The reversal of 187042538 is 835240781.

It can be written as a sum of positive squares in 2 ways, for example, as 156825529 + 30217009 = 12523^2 + 5497^2 .

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

It is a super-2 number, since 2×187042538² = 69969822042962888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341045 + ... + 341592.

Almost surely, 2^187042538 is an apocalyptic number.

187042538 is a deficient number, since it is larger than the sum of its proper divisors (95569594).

187042538 is a wasteful number, since it uses less digits than its factorization.

187042538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682776.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 187042538 is about 13676.3495860555. The cubic root of 187042538 is about 571.8912637456.

The spelling of 187042538 in words is "one hundred eighty-seven million, forty-two thousand, five hundred thirty-eight".