556740730 has 32 divisors (see below), whose sum is σ = 1233396864. Its totient is φ = 176198976.

The previous prime is 556740719. The next prime is 556740757. The reversal of 556740730 is 37047655.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 556740730.

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, 304992 + ... + 306811.

It is an arithmetic number, because the mean of its divisors is an integer number (38543652).

Almost surely, 2^556740730 is an apocalyptic number.

556740730 is an abundant number, since it is smaller than the sum of its proper divisors (676656134).

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

556740730 is a wasteful number, since it uses less digits than its factorization.

556740730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611830.

The product of its (nonzero) digits is 88200, while the sum is 37.

The square root of 556740730 is about 23595.3539918349. The cubic root of 556740730 is about 822.6548545441.

The spelling of 556740730 in words is "five hundred fifty-six million, seven hundred forty thousand, seven hundred thirty".