157828761 has 12 divisors (see below), whose sum is σ = 230233380. Its totient is φ = 104176800.

The previous prime is 157828661. The next prime is 157828813. The reversal of 157828761 is 167828751.

It is a happy number.

157828761 is a `hidden beast` number, since 1 + 578 + 2 + 8 + 76 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 140564736 + 17264025 = 11856^2 + 4155^2 .

It is not a de Polignac number, because 157828761 - 2¹³ = 157820569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157828661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85906 + ... + 87723.

It is an arithmetic number, because the mean of its divisors is an integer number (19186115).

Almost surely, 2^157828761 is an apocalyptic number.

It is an amenable number.

157828761 is a deficient number, since it is larger than the sum of its proper divisors (72404619).

157828761 is a wasteful number, since it uses less digits than its factorization.

157828761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173736 (or 173733 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The square root of 157828761 is about 12562.9917217198. The cubic root of 157828761 is about 540.4166434716.

The spelling of 157828761 in words is "one hundred fifty-seven million, eight hundred twenty-eight thousand, seven hundred sixty-one".