157328905 has 4 divisors (see below), whose sum is σ = 188794692. Its totient is φ = 125863120.

The previous prime is 157328893. The next prime is 157328929. The reversal of 157328905 is 509823751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124277904 + 33051001 = 11148^2 + 5749^2 .

It is not a de Polignac number, because 157328905 - 2¹⁵ = 157296137 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15732886 + ... + 15732895.

It is an arithmetic number, because the mean of its divisors is an integer number (47198673).

Almost surely, 2^157328905 is an apocalyptic number.

It is an amenable number.

157328905 is a deficient number, since it is larger than the sum of its proper divisors (31465787).

157328905 is an equidigital number, since it uses as much as digits as its factorization.

157328905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31465786.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 157328905 is about 12543.0819577965. The cubic root of 157328905 is about 539.8455262312.

The spelling of 157328905 in words is "one hundred fifty-seven million, three hundred twenty-eight thousand, nine hundred five".