157865889 has 8 divisors (see below), whose sum is σ = 221566240. Its totient is φ = 99704736.

The previous prime is 157865881. The next prime is 157865921. The reversal of 157865889 is 988568751.

It is a happy number.

157865889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157865889 - 2³ = 157865881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 2769577 = 157865889 / (1 + 5 + 7 + 8 + 6 + 5 + 8 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157865881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1384732 + ... + 1384845.

It is an arithmetic number, because the mean of its divisors is an integer number (27695780).

Almost surely, 2^157865889 is an apocalyptic number.

157865889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

157865889 is a deficient number, since it is larger than the sum of its proper divisors (63700351).

157865889 is a wasteful number, since it uses less digits than its factorization.

157865889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769599.

The product of its digits is 4838400, while the sum is 57.

The square root of 157865889 is about 12564.4693083313. The cubic root of 157865889 is about 540.4590164330.

The spelling of 157865889 in words is "one hundred fifty-seven million, eight hundred sixty-five thousand, eight hundred eighty-nine".