723844542 has 64 divisors (see below), whose sum is σ = 1533210624. Its totient is φ = 227525760.

The previous prime is 723844507. The next prime is 723844543. The reversal of 723844542 is 245448327.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 723844542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723844543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1823088 + ... + 1823484.

It is an arithmetic number, because the mean of its divisors is an integer number (23956416).

Almost surely, 2^723844542 is an apocalyptic number.

723844542 is an abundant number, since it is smaller than the sum of its proper divisors (809366082).

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

723844542 is a wasteful number, since it uses less digits than its factorization.

723844542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673.

The product of its digits is 215040, while the sum is 39.

The square root of 723844542 is about 26904.3591635259. The cubic root of 723844542 is about 897.8733913431.

The spelling of 723844542 in words is "seven hundred twenty-three million, eight hundred forty-four thousand, five hundred forty-two".