723784740 has 96 divisors (see below), whose sum is σ = 2328372480. Its totient is φ = 164560896.

The previous prime is 723784739. The next prime is 723784751. The reversal of 723784740 is 47487327.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 723784692 and 723784701.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76596 + ... + 85524.

It is an arithmetic number, because the mean of its divisors is an integer number (24253880).

Almost surely, 2^723784740 is an apocalyptic number.

723784740 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723784740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1164186240).

723784740 is an abundant number, since it is smaller than the sum of its proper divisors (1604587740).

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

723784740 is a wasteful number, since it uses less digits than its factorization.

723784740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9141 (or 9139 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 42.

The square root of 723784740 is about 26903.2477593320. The cubic root of 723784740 is about 897.8486640708.

The spelling of 723784740 in words is "seven hundred twenty-three million, seven hundred eighty-four thousand, seven hundred forty".