157840220 has 48 divisors (see below), whose sum is σ = 360192000. Its totient is φ = 57879360.

The previous prime is 157840213. The next prime is 157840247. The reversal of 157840220 is 22048751.

157840220 = T₂₂₆ + T₂₂₇ + ... + T₉₈₅.

157840220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5081 + ... + 18479.

It is an arithmetic number, because the mean of its divisors is an integer number (7504000).

Almost surely, 2^157840220 is an apocalyptic number.

157840220 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 157840220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180096000).

157840220 is an abundant number, since it is smaller than the sum of its proper divisors (202351780).

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

157840220 is a wasteful number, since it uses less digits than its factorization.

157840220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13458 (or 13456 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 157840220 is about 12563.4477751929. The cubic root of 157840220 is about 540.4297219592.

Adding to 157840220 its reverse (22048751), we get a palindrome (179888971).

The spelling of 157840220 in words is "one hundred fifty-seven million, eight hundred forty thousand, two hundred twenty".