556240820 has 24 divisors (see below), whose sum is σ = 1173984000. Its totient is φ = 221376672.

The previous prime is 556240813. The next prime is 556240829. The reversal of 556240820 is 28042655.

556240820 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 not an unprimeable number, because it can be changed into a prime (556240829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65900 + ... + 73859.

It is an arithmetic number, because the mean of its divisors is an integer number (48916000).

Almost surely, 2^556240820 is an apocalyptic number.

It is an amenable number.

556240820 is an abundant number, since it is smaller than the sum of its proper divisors (617743180).

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

556240820 is a wasteful number, since it uses less digits than its factorization.

556240820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139967 (or 139965 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 556240820 is about 23584.7582137278. The cubic root of 556240820 is about 822.4085540558.

The spelling of 556240820 in words is "five hundred fifty-six million, two hundred forty thousand, eight hundred twenty".