723819540 has 96 divisors (see below), whose sum is σ = 2162692224. Its totient is φ = 180244480.

The previous prime is 723819533. The next prime is 723819541. The reversal of 723819540 is 45918327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723819541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130912 + ... + 136328.

It is an arithmetic number, because the mean of its divisors is an integer number (22528044).

Almost surely, 2^723819540 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 723819540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1081346112).

723819540 is an abundant number, since it is smaller than the sum of its proper divisors (1438872684).

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

723819540 is a wasteful number, since it uses less digits than its factorization.

723819540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577 (or 5575 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 723819540 is about 26903.8945136201. The cubic root of 723819540 is about 897.8630535391.

The spelling of 723819540 in words is "seven hundred twenty-three million, eight hundred nineteen thousand, five hundred forty".