158491090 has 32 divisors (see below), whose sum is σ = 296336880. Its totient is φ = 60958464.

The previous prime is 158491087. The next prime is 158491133. The reversal of 158491090 is 90194851.

It can be written as a sum of positive squares in 8 ways, for example, as 23629321 + 134861769 = 4861^2 + 11613^2 .

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 15 ways as a sum of consecutive naturals, for example, 79344 + ... + 81316.

Almost surely, 2^158491090 is an apocalyptic number.

158491090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

158491090 is a deficient number, since it is larger than the sum of its proper divisors (137845790).

158491090 is a wasteful number, since it uses less digits than its factorization.

158491090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2286.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 158491090 is about 12589.3244457358. The cubic root of 158491090 is about 541.1715419809.

The spelling of 158491090 in words is "one hundred fifty-eight million, four hundred ninety-one thousand, ninety".