556439040 has 120 divisors (see below), whose sum is σ = 1927184688. Its totient is φ = 148377600.

The previous prime is 556439033. The next prime is 556439071. The reversal of 556439040 is 40934655.

It is a happy number.

556439040 is a `hidden beast` number, since 5 + 5 + 643 + 9 + 0 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×556439040² = 619248810472243200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 556438986 and 556439004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10965 + ... + 35115.

Almost surely, 2^556439040 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 556439040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963592344).

556439040 is an abundant number, since it is smaller than the sum of its proper divisors (1370745648).

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

556439040 is a wasteful number, since it uses less digits than its factorization.

556439040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24180 (or 24161 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 556439040 is about 23588.9601296878. The cubic root of 556439040 is about 822.5062326496.

The spelling of 556439040 in words is "five hundred fifty-six million, four hundred thirty-nine thousand, forty".