157299840 has 128 divisors (see below), whose sum is σ = 557164800. Its totient is φ = 41942016.

The previous prime is 157299817. The next prime is 157299847. The reversal of 157299840 is 48992751.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (157299847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12729 + ... + 21831.

It is an arithmetic number, because the mean of its divisors is an integer number (4352850).

Almost surely, 2^157299840 is an apocalyptic number.

157299840 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 157299840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278582400).

157299840 is an abundant number, since it is smaller than the sum of its proper divisors (399864960).

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

157299840 is an equidigital number, since it uses as much as digits as its factorization.

157299840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9131 (or 9113 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 157299840 is about 12541.9232974851. The cubic root of 157299840 is about 539.8122804298.

The spelling of 157299840 in words is "one hundred fifty-seven million, two hundred ninety-nine thousand, eight hundred forty".