157749760 has 80 divisors (see below), whose sum is σ = 432311616. Its totient is φ = 54079488.

The previous prime is 157749751. The next prime is 157749773. The reversal of 157749760 is 67947751.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 157749760.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13519 + ... + 22321.

Almost surely, 2^157749760 is an apocalyptic number.

157749760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157749760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216155808).

157749760 is an abundant number, since it is smaller than the sum of its proper divisors (274561856).

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

157749760 is an frugal number, since it uses more digits than its factorization.

157749760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8833 (or 8817 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 157749760 is about 12559.8471328277. The cubic root of 157749760 is about 540.3264601186.

The spelling of 157749760 in words is "one hundred fifty-seven million, seven hundred forty-nine thousand, seven hundred sixty".