556728897 has 8 divisors (see below), whose sum is σ = 754886880. Its totient is φ = 364861760.

The previous prime is 556728889. The next prime is 556728911. The reversal of 556728897 is 798827655.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 556728897 - 2³ = 556728889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556728817) 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, 1572504 + ... + 1572857.

It is an arithmetic number, because the mean of its divisors is an integer number (94360860).

Almost surely, 2^556728897 is an apocalyptic number.

It is an amenable number.

556728897 is a deficient number, since it is larger than the sum of its proper divisors (198157983).

556728897 is a wasteful number, since it uses less digits than its factorization.

556728897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145423.

The product of its digits is 8467200, while the sum is 57.

The square root of 556728897 is about 23595.1032419865. The cubic root of 556728897 is about 822.6490262514.

The spelling of 556728897 in words is "five hundred fifty-six million, seven hundred twenty-eight thousand, eight hundred ninety-seven".