556400587 has 4 divisors (see below), whose sum is σ = 561324600. Its totient is φ = 551476576.

The previous prime is 556400573. The next prime is 556400597. The reversal of 556400587 is 785004655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556400587 is a prime.

It is a super-2 number, since 2×556400587² = 619163226427889138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556400597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2461837 + ... + 2462062.

It is an arithmetic number, because the mean of its divisors is an integer number (140331150).

Almost surely, 2^556400587 is an apocalyptic number.

556400587 is a deficient number, since it is larger than the sum of its proper divisors (4924013).

556400587 is a wasteful number, since it uses less digits than its factorization.

556400587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924012.

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 556400587 is about 23588.1450521231. The cubic root of 556400587 is about 822.4872856440.

The spelling of 556400587 in words is "five hundred fifty-six million, four hundred thousand, five hundred eighty-seven".