158897840 has 20 divisors (see below), whose sum is σ = 369437664. Its totient is φ = 63559104.

The previous prime is 158897839. The next prime is 158897867. The reversal of 158897840 is 48798851.

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 993032 + ... + 993191.

Almost surely, 2^158897840 is an apocalyptic number.

158897840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158897840 is an abundant number, since it is smaller than the sum of its proper divisors (210539824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158897840 is a wasteful number, since it uses less digits than its factorization.

158897840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986236 (or 1986230 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 50.

The square root of 158897840 is about 12605.4686545166. The cubic root of 158897840 is about 541.6340989755.

The spelling of 158897840 in words is "one hundred fifty-eight million, eight hundred ninety-seven thousand, eight hundred forty".