157489812 has 24 divisors (see below), whose sum is σ = 408307200. Its totient is φ = 52496568.

The previous prime is 157489811. The next prime is 157489817. The reversal of 157489812 is 218984751.

157489812 is a `hidden beast` number, since 157 + 489 + 8 + 12 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157489811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729012 + ... + 729227.

It is an arithmetic number, because the mean of its divisors is an integer number (17012800).

Almost surely, 2^157489812 is an apocalyptic number.

157489812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157489812 is an abundant number, since it is smaller than the sum of its proper divisors (250817388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157489812 is a wasteful number, since it uses less digits than its factorization.

157489812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458252 (or 1458244 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 157489812 is about 12549.4944918112. The cubic root of 157489812 is about 540.0295045607.

The spelling of 157489812 in words is "one hundred fifty-seven million, four hundred eighty-nine thousand, eight hundred twelve".