556611440 has 80 divisors (see below), whose sum is σ = 1613468160. Its totient is φ = 173487360.

The previous prime is 556611439. The next prime is 556611463. The reversal of 556611440 is 44116655.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 556611397 and 556611406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39020 + ... + 51339.

It is an arithmetic number, because the mean of its divisors is an integer number (20168352).

Almost surely, 2^556611440 is an apocalyptic number.

It is an amenable number.

556611440 is an abundant number, since it is smaller than the sum of its proper divisors (1056856720).

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

556611440 is a wasteful number, since it uses less digits than its factorization.

556611440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90390 (or 90384 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 556611440 is about 23592.6140984843. The cubic root of 556611440 is about 822.5911688374.

The spelling of 556611440 in words is "five hundred fifty-six million, six hundred eleven thousand, four hundred forty".