157820380 has 48 divisors (see below), whose sum is σ = 343478016. Its totient is φ = 60848640.

The previous prime is 157820347. The next prime is 157820381. The reversal of 157820380 is 83028751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157820381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283062 + ... + 283618.

It is an arithmetic number, because the mean of its divisors is an integer number (7155792).

Almost surely, 2^157820380 is an apocalyptic number.

157820380 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 157820380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171739008).

157820380 is an abundant number, since it is smaller than the sum of its proper divisors (185657636).

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

157820380 is a wasteful number, since it uses less digits than its factorization.

157820380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054 (or 1052 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 157820380 is about 12562.6581582084. The cubic root of 157820380 is about 540.4070775935.

The spelling of 157820380 in words is "one hundred fifty-seven million, eight hundred twenty thousand, three hundred eighty".