1557046220 has 12 divisors (see below), whose sum is σ = 3269797104. Its totient is φ = 622818480.

The previous prime is 1557046213. The next prime is 1557046277. The reversal of 1557046220 is 226407551.

1557046220 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 38926136 + ... + 38926175.

It is an arithmetic number, because the mean of its divisors is an integer number (272483092).

Almost surely, 2^1557046220 is an apocalyptic number.

1557046220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1557046220 is an abundant number, since it is smaller than the sum of its proper divisors (1712750884).

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

1557046220 is a wasteful number, since it uses less digits than its factorization.

1557046220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77852320 (or 77852318 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 1557046220 is about 39459.4249831393. The cubic root of 1557046220 is about 1159.0455436571.

The spelling of 1557046220 in words is "one billion, five hundred fifty-seven million, forty-six thousand, two hundred twenty".