723307572 has 36 divisors (see below), whose sum is σ = 1969005220. Its totient is φ = 222556032.

The previous prime is 723307553. The next prime is 723307573. The reversal of 723307572 is 275703327.

It can be written as a sum of positive squares in 2 ways, for example, as 387538596 + 335768976 = 19686^2 + 18324^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723307573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 772297 + ... + 773232.

Almost surely, 2^723307572 is an apocalyptic number.

It is an amenable number.

723307572 is an abundant number, since it is smaller than the sum of its proper divisors (1245697648).

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

723307572 is a wasteful number, since it uses less digits than its factorization.

723307572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545552 (or 1545547 counting only the distinct ones).

The product of its (nonzero) digits is 61740, while the sum is 36.

The square root of 723307572 is about 26894.3780742370. The cubic root of 723307572 is about 897.6513131131.

The spelling of 723307572 in words is "seven hundred twenty-three million, three hundred seven thousand, five hundred seventy-two".