1557382380 has 48 divisors (see below), whose sum is σ = 4364285184. Its totient is φ = 414957760.

The previous prime is 1557382339. The next prime is 1557382469. The reversal of 1557382380 is 832837551.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66865 + ... + 87095.

It is an arithmetic number, because the mean of its divisors is an integer number (90922608).

Almost surely, 2^1557382380 is an apocalyptic number.

1557382380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1557382380 is an abundant number, since it is smaller than the sum of its proper divisors (2806902804).

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

1557382380 is a wasteful number, since it uses less digits than its factorization.

1557382380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21526 (or 21524 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 1557382380 is about 39463.6843186239. The cubic root of 1557382380 is about 1159.1289487414.

The spelling of 1557382380 in words is "one billion, five hundred fifty-seven million, three hundred eighty-two thousand, three hundred eighty".