158436890 has 16 divisors (see below), whose sum is σ = 288128232. Its totient is φ = 62721024.

The previous prime is 158436881. The next prime is 158436911. The reversal of 158436890 is 98634851.

158436890 is digitally balanced in base 3, because in such base 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 156025081 + 2411809 = 12491^2 + 1553^2 .

It is a super-2 number, since 2×158436890² = 50204496225744200, 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 7 ways as a sum of consecutive naturals, for example, 80699 + ... + 82638.

Almost surely, 2^158436890 is an apocalyptic number.

158436890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

158436890 is a deficient number, since it is larger than the sum of its proper divisors (129691342).

158436890 is a wasteful number, since it uses less digits than its factorization.

158436890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163441.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 158436890 is about 12587.1716441781. The cubic root of 158436890 is about 541.1098458906.

The spelling of 158436890 in words is "one hundred fifty-eight million, four hundred thirty-six thousand, eight hundred ninety".