723763640 has 16 divisors (see below), whose sum is σ = 1628468280. Its totient is φ = 289505440.

The previous prime is 723763631. The next prime is 723763673. The reversal of 723763640 is 46367327.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 723763594 and 723763603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9047006 + ... + 9047085.

Almost surely, 2^723763640 is an apocalyptic number.

It is an amenable number.

723763640 is an abundant number, since it is smaller than the sum of its proper divisors (904704640).

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

723763640 is a wasteful number, since it uses less digits than its factorization.

723763640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18094102 (or 18094098 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 38.

The square root of 723763640 is about 26902.8556105109. The cubic root of 723763640 is about 897.8399391973.

The spelling of 723763640 in words is "seven hundred twenty-three million, seven hundred sixty-three thousand, six hundred forty".