157789994 has 8 divisors (see below), whose sum is σ = 236750688. Its totient is φ = 78873100.

The previous prime is 157789991. The next prime is 157790027. The reversal of 157789994 is 499987751.

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

It is not an unprimeable number, because it can be changed into a prime (157789991) 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, 419 + ... + 17769.

It is an arithmetic number, because the mean of its divisors is an integer number (29593836).

Almost surely, 2^157789994 is an apocalyptic number.

157789994 is a deficient number, since it is larger than the sum of its proper divisors (78960694).

157789994 is a wasteful number, since it uses less digits than its factorization.

157789994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21900.

The product of its digits is 5715360, while the sum is 59.

The square root of 157789994 is about 12561.4487221817. The cubic root of 157789994 is about 540.3723928812.

The spelling of 157789994 in words is "one hundred fifty-seven million, seven hundred eighty-nine thousand, nine hundred ninety-four".