723736 has 16 divisors (see below), whose sum is σ = 1461600. Its totient is φ = 333984.

The previous prime is 723727. The next prime is 723739. The reversal of 723736 is 637327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3376 + ... + 3583.

It is an arithmetic number, because the mean of its divisors is an integer number (91350).

2⁷²³⁷³⁶ is an apocalyptic number.

It is an amenable number.

723736 is an abundant number, since it is smaller than the sum of its proper divisors (737864).

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

723736 is a wasteful number, since it uses less digits than its factorization.

723736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6978 (or 6974 counting only the distinct ones).

The product of its digits is 5292, while the sum is 28.

The square root of 723736 is about 850.7267481395. The cubic root of 723736 is about 89.7828509770.

Adding to 723736 its product of digits (5292), we get a triangular number (729028 = T₁₂₀₇).

The spelling of 723736 in words is "seven hundred twenty-three thousand, seven hundred thirty-six".