157728573 has 8 divisors (see below), whose sum is σ = 233672000. Its totient is φ = 105152364.

The previous prime is 157728553. The next prime is 157728577. The reversal of 157728573 is 375827751.

157728573 is a `hidden beast` number, since 1 + 5 + 7 + 72 + 8 + 573 = 666.

It is not a de Polignac number, because 157728573 - 2⁵ = 157728541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157728577) 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, 2920873 + ... + 2920926.

It is an arithmetic number, because the mean of its divisors is an integer number (29209000).

Almost surely, 2^157728573 is an apocalyptic number.

It is an amenable number.

157728573 is a deficient number, since it is larger than the sum of its proper divisors (75943427).

157728573 is an equidigital number, since it uses as much as digits as its factorization.

157728573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5841808 (or 5841802 counting only the distinct ones).

The product of its digits is 411600, while the sum is 45.

The square root of 157728573 is about 12559.0036627115. The cubic root of 157728573 is about 540.3022690427.

The spelling of 157728573 in words is "one hundred fifty-seven million, seven hundred twenty-eight thousand, five hundred seventy-three".