187742090 has 16 divisors (see below), whose sum is σ = 338848488. Its totient is φ = 74894016.

The previous prime is 187742089. The next prime is 187742129. The reversal of 187742090 is 90247781.

187742090 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 172633321 + 15108769 = 13139^2 + 3887^2 .

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, 21437 + ... + 28896.

Almost surely, 2^187742090 is an apocalyptic number.

187742090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

187742090 is a deficient number, since it is larger than the sum of its proper divisors (151106398).

187742090 is a wasteful number, since it uses less digits than its factorization.

187742090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50713.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 187742090 is about 13701.9009630051. The cubic root of 187742090 is about 572.6033476654.

The spelling of 187742090 in words is "one hundred eighty-seven million, seven hundred forty-two thousand, ninety".