157040986 has 4 divisors (see below), whose sum is σ = 235561482. Its totient is φ = 78520492.

The previous prime is 157040981. The next prime is 157041013. The reversal of 157040986 is 689040751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 155775361 + 1265625 = 12481^2 + 1125^2 .

It is a Smith number, since the sum of its digits (40) 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 (157040981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39260245 + ... + 39260248.

Almost surely, 2^157040986 is an apocalyptic number.

157040986 is a deficient number, since it is larger than the sum of its proper divisors (78520496).

157040986 is an equidigital number, since it uses as much as digits as its factorization.

157040986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78520495.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 157040986 is about 12531.5994988669. The cubic root of 157040986 is about 539.5160112440.

The spelling of 157040986 in words is "one hundred fifty-seven million, forty thousand, nine hundred eighty-six".