724667442 has 16 divisors (see below), whose sum is σ = 1458015552. Its totient is φ = 240109040.

The previous prime is 724667401. The next prime is 724667491. The reversal of 724667442 is 244766427.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 724667394 and 724667403.

It is an unprimeable number.

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, 360609 + ... + 362612.

It is an arithmetic number, because the mean of its divisors is an integer number (91125972).

Almost surely, 2^724667442 is an apocalyptic number.

724667442 is an abundant number, since it is smaller than the sum of its proper divisors (733348110).

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

724667442 is a wasteful number, since it uses less digits than its factorization.

724667442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723393.

The product of its digits is 451584, while the sum is 42.

The square root of 724667442 is about 26919.6478803123. The cubic root of 724667442 is about 898.2135105066.

The spelling of 724667442 in words is "seven hundred twenty-four million, six hundred sixty-seven thousand, four hundred forty-two".