723690 has 96 divisors (see below), whose sum is σ = 2223936. Its totient is φ = 161280.

The previous prime is 723661. The next prime is 723721. The reversal of 723690 is 96327.

723690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×723690² = 1047454432200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

723690 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16809 + ... + 16851.

It is an arithmetic number, because the mean of its divisors is an integer number (23166).

2⁷²³⁶⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1111968).

723690 is an abundant number, since it is smaller than the sum of its proper divisors (1500246).

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

723690 is a wasteful number, since it uses less digits than its factorization.

723690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 723690 is about 850.6997120018. The cubic root of 723690 is about 89.7809487647.

The spelling of 723690 in words is "seven hundred twenty-three thousand, six hundred ninety".