723266840 has 64 divisors (see below), whose sum is σ = 1667757600. Its totient is φ = 282201088.

The previous prime is 723266807. The next prime is 723266849. The reversal of 723266840 is 48662327.

It is a super-2 number, since 2×723266840² = 1046229843687171200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 723266794 and 723266803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723266849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322202 + ... + 324438.

Almost surely, 2^723266840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723266840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (833878800).

723266840 is an abundant number, since it is smaller than the sum of its proper divisors (944490760).

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

723266840 is a wasteful number, since it uses less digits than its factorization.

723266840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 723266840 is about 26893.6208049418. The cubic root of 723266840 is about 897.6344628265.

The spelling of 723266840 in words is "seven hundred twenty-three million, two hundred sixty-six thousand, eight hundred forty".