157987840 has 88 divisors (see below), whose sum is σ = 386146080. Its totient is φ = 62005248.

The previous prime is 157987813. The next prime is 157987847. The reversal of 157987840 is 48789751.

It is a Smith number, since the sum of its digits (49) 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 (157987847) 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, 301819 + ... + 302341.

Almost surely, 2^157987840 is an apocalyptic number.

157987840 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 157987840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193073040).

157987840 is an abundant number, since it is smaller than the sum of its proper divisors (228158240).

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

157987840 is an equidigital number, since it uses as much as digits as its factorization.

157987840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 157987840 is about 12569.3213818408. The cubic root of 157987840 is about 540.5981483540.

The spelling of 157987840 in words is "one hundred fifty-seven million, nine hundred eighty-seven thousand, eight hundred forty".