723992 has 8 divisors (see below), whose sum is σ = 1357500. Its totient is φ = 361992.

The previous prime is 723977. The next prime is 723997. The reversal of 723992 is 299327.

It is a tau number, because it is divible by the number of its divisors (8).

It is a d-powerful number, because it can be written as 7⁴ + 2 + 9⁵ + 3³ + 9⁶ + 2¹⁷ .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 723992.

It is not an unprimeable number, because it can be changed into a prime (723997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45242 + ... + 45257.

2⁷²³⁹⁹² is an apocalyptic number.

It is an amenable number.

723992 is a deficient number, since it is larger than the sum of its proper divisors (633508).

723992 is a wasteful number, since it uses less digits than its factorization.

723992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90505 (or 90501 counting only the distinct ones).

The product of its digits is 6804, while the sum is 32.

The square root of 723992 is about 850.8771944294. The cubic root of 723992 is about 89.7934357300.

The spelling of 723992 in words is "seven hundred twenty-three thousand, nine hundred ninety-two".