556728396 has 144 divisors (see below), whose sum is σ = 1569085056. Its totient is φ = 153086976.

The previous prime is 556728323. The next prime is 556728433. The reversal of 556728396 is 693827655.

It is a happy number.

556728396 is a nontrivial binomial coefficient, being equal to C(33369, 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2452435 + ... + 2452661.

It is an arithmetic number, because the mean of its divisors is an integer number (10896424).

Almost surely, 2^556728396 is an apocalyptic number.

556728396 is the 33368-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556728396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (784542528).

556728396 is an abundant number, since it is smaller than the sum of its proper divisors (1012356660).

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

556728396 is a wasteful number, since it uses less digits than its factorization.

556728396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 379 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The square root of 556728396 is about 23595.0926253745. The cubic root of 556728396 is about 822.6487794842.

The spelling of 556728396 in words is "five hundred fifty-six million, seven hundred twenty-eight thousand, three hundred ninety-six".