157236489 has 12 divisors (see below), whose sum is σ = 227849076. Its totient is φ = 104487552.

The previous prime is 157236439. The next prime is 157236503. The reversal of 157236489 is 984632751.

157236489 is a `hidden beast` number, since 1 + 572 + 36 + 48 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 77580864 + 79655625 = 8808^2 + 8925^2 .

It is not a de Polignac number, because 157236489 - 2¹⁵ = 157203721 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157236439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25092 + ... + 30725.

It is an arithmetic number, because the mean of its divisors is an integer number (18987423).

Almost surely, 2^157236489 is an apocalyptic number.

It is an amenable number.

157236489 is a deficient number, since it is larger than the sum of its proper divisors (70612587).

157236489 is a wasteful number, since it uses less digits than its factorization.

157236489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56136 (or 56133 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 157236489 is about 12539.3974735631. The cubic root of 157236489 is about 539.7398026284.

The spelling of 157236489 in words is "one hundred fifty-seven million, two hundred thirty-six thousand, four hundred eighty-nine".