158440857 has 8 divisors (see below), whose sum is σ = 211536576. Its totient is φ = 105486192.

The previous prime is 158440837. The next prime is 158440921. The reversal of 158440857 is 758044851.

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

It is not a de Polignac number, because 158440857 - 2¹¹ = 158438809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158440817) 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, 32613 + ... + 37154.

It is an arithmetic number, because the mean of its divisors is an integer number (26442072).

Almost surely, 2^158440857 is an apocalyptic number.

It is an amenable number.

158440857 is a deficient number, since it is larger than the sum of its proper divisors (53095719).

158440857 is an equidigital number, since it uses as much as digits as its factorization.

158440857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70527.

The product of its (nonzero) digits is 179200, while the sum is 42.

The square root of 158440857 is about 12587.3292242636. The cubic root of 158440857 is about 541.1143620208.

The spelling of 158440857 in words is "one hundred fifty-eight million, four hundred forty thousand, eight hundred fifty-seven".