723988 has 12 divisors (see below), whose sum is σ = 1294272. Its totient is φ = 354200.

The previous prime is 723977. The next prime is 723997. The reversal of 723988 is 889327.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1738 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (107856).

2⁷²³⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

723988 is a deficient number, since it is larger than the sum of its proper divisors (570284).

723988 is a wasteful number, since it uses less digits than its factorization.

723988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3902 (or 3900 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 723988 is about 850.8748439107. The cubic root of 723988 is about 89.7932703624.

It can be divided in two parts, 723 and 988, that added together give a triangular number (1711 = T₅₈).

The spelling of 723988 in words is "seven hundred twenty-three thousand, nine hundred eighty-eight".