157842278 has 8 divisors (see below), whose sum is σ = 258287400. Its totient is φ = 71746480.

The previous prime is 157842277. The next prime is 157842281. The reversal of 157842278 is 872248751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157842277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3587303 + ... + 3587346.

It is an arithmetic number, because the mean of its divisors is an integer number (32285925).

Almost surely, 2^157842278 is an apocalyptic number.

157842278 is a deficient number, since it is larger than the sum of its proper divisors (100445122).

157842278 is a wasteful number, since it uses less digits than its factorization.

157842278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7174662.

The product of its digits is 250880, while the sum is 44.

The square root of 157842278 is about 12563.5296791945. The cubic root of 157842278 is about 540.4320707469.

The spelling of 157842278 in words is "one hundred fifty-seven million, eight hundred forty-two thousand, two hundred seventy-eight".