723412240 has 40 divisors (see below), whose sum is σ = 1684064088. Its totient is φ = 288998400.

The previous prime is 723412229. The next prime is 723412247. The reversal of 723412240 is 42214327.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 43454464 + 679957776 = 6592^2 + 26076^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (723412247) 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 7 ways as a sum of consecutive naturals, for example, 62940 + ... + 73540.

Almost surely, 2^723412240 is an apocalyptic number.

It is an amenable number.

723412240 is an abundant number, since it is smaller than the sum of its proper divisors (960651848).

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

723412240 is a wasteful number, since it uses less digits than its factorization.

723412240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11467 (or 11461 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 723412240 is about 26896.3239123862. The cubic root of 723412240 is about 897.6946099713.

Adding to 723412240 its reverse (42214327), we get a palindrome (765626567).

The spelling of 723412240 in words is "seven hundred twenty-three million, four hundred twelve thousand, two hundred forty".