187890542 has 16 divisors (see below), whose sum is σ = 336102912. Its totient is φ = 77023320.

The previous prime is 187890529. The next prime is 187890557. The reversal of 187890542 is 245098781.

It is a junction number, because it is equal to n+sod(n) for n = 187890493 and 187890502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291434 + ... + 292077.

It is an arithmetic number, because the mean of its divisors is an integer number (21006432).

Almost surely, 2^187890542 is an apocalyptic number.

187890542 is a deficient number, since it is larger than the sum of its proper divisors (148212370).

187890542 is a wasteful number, since it uses less digits than its factorization.

187890542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583543.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 187890542 is about 13707.3170970836. The cubic root of 187890542 is about 572.7542314604.

The spelling of 187890542 in words is "one hundred eighty-seven million, eight hundred ninety thousand, five hundred forty-two".