157982878 has 4 divisors (see below), whose sum is σ = 236974320. Its totient is φ = 78991438.

The previous prime is 157982873. The next prime is 157982879. The reversal of 157982878 is 878289751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878289751 = 17 ⋅51664103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157982873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39495718 + ... + 39495721.

It is an arithmetic number, because the mean of its divisors is an integer number (59243580).

Almost surely, 2^157982878 is an apocalyptic number.

157982878 is a deficient number, since it is larger than the sum of its proper divisors (78991442).

157982878 is an equidigital number, since it uses as much as digits as its factorization.

157982878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78991441.

The product of its digits is 2257920, while the sum is 55.

The square root of 157982878 is about 12569.1239949330. The cubic root of 157982878 is about 540.5924886861.

The spelling of 157982878 in words is "one hundred fifty-seven million, nine hundred eighty-two thousand, eight hundred seventy-eight".