723978556 has 24 divisors (see below), whose sum is σ = 1487093216. Its totient is φ = 301890240.

The previous prime is 723978547. The next prime is 723978559. The reversal of 723978556 is 655879327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723978559) 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, 348375 + ... + 350446.

Almost surely, 2^723978556 is an apocalyptic number.

It is an amenable number.

723978556 is an abundant number, since it is smaller than the sum of its proper divisors (763114660).

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

723978556 is a wasteful number, since it uses less digits than its factorization.

723978556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698869 (or 698867 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 52.

The square root of 723978556 is about 26906.8496112050. The cubic root of 723978556 is about 897.9287992714.

The spelling of 723978556 in words is "seven hundred twenty-three million, nine hundred seventy-eight thousand, five hundred fifty-six".