157798282 has 4 divisors (see below), whose sum is σ = 236697426. Its totient is φ = 78899140.

The previous prime is 157798247. The next prime is 157798283. The reversal of 157798282 is 282897751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 282897751 = 181 ⋅1562971.

It can be written as a sum of positive squares in only one way, i.e., 83338641 + 74459641 = 9129^2 + 8629^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (157798283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39449569 + ... + 39449572.

Almost surely, 2^157798282 is an apocalyptic number.

157798282 is a deficient number, since it is larger than the sum of its proper divisors (78899144).

157798282 is an equidigital number, since it uses as much as digits as its factorization.

157798282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78899143.

The product of its digits is 564480, while the sum is 49.

The square root of 157798282 is about 12561.7786161037. The cubic root of 157798282 is about 540.3818538275.

The spelling of 157798282 in words is "one hundred fifty-seven million, seven hundred ninety-eight thousand, two hundred eighty-two".