158961890 has 16 divisors (see below), whose sum is σ = 286276032. Its totient is φ = 63552624.

The previous prime is 158961877. The next prime is 158961899. The reversal of 158961890 is 98169851.

It is not an unprimeable number, because it can be changed into a prime (158961899) by changing a digit.

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, 33017 + ... + 37523.

It is an arithmetic number, because the mean of its divisors is an integer number (17892252).

Almost surely, 2^158961890 is an apocalyptic number.

158961890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

158961890 is a deficient number, since it is larger than the sum of its proper divisors (127314142).

158961890 is a wasteful number, since it uses less digits than its factorization.

158961890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8041.

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 158961890 is about 12608.0089625603. The cubic root of 158961890 is about 541.7068648142.

The spelling of 158961890 in words is "one hundred fifty-eight million, nine hundred sixty-one thousand, eight hundred ninety".