556804920 has 128 divisors (see below), whose sum is σ = 1928240640. Its totient is φ = 125990400.

The previous prime is 556804883. The next prime is 556804921. The reversal of 556804920 is 29408655.

556804920 = T₈₁ + T₈₂ + ... + T₁₄₉₄.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556804921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81559 + ... + 88121.

It is an arithmetic number, because the mean of its divisors is an integer number (15064380).

Almost surely, 2^556804920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556804920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964120320).

556804920 is an abundant number, since it is smaller than the sum of its proper divisors (1371435720).

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

556804920 is a wasteful number, since it uses less digits than its factorization.

556804920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6685 (or 6681 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 556804920 is about 23596.7141780376. The cubic root of 556804920 is about 822.6864696107.

The spelling of 556804920 in words is "five hundred fifty-six million, eight hundred four thousand, nine hundred twenty".