724421040 has 80 divisors (see below), whose sum is σ = 2566526208. Its totient is φ = 165581568.

The previous prime is 724421029. The next prime is 724421069. The reversal of 724421040 is 40124427.

724421040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 724421040.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213922 + ... + 217281.

Almost surely, 2^724421040 is an apocalyptic number.

724421040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

724421040 is an abundant number, since it is smaller than the sum of its proper divisors (1842105168).

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

724421040 is a wasteful number, since it uses less digits than its factorization.

724421040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431226 (or 431220 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 724421040 is about 26915.0708711681. The cubic root of 724421040 is about 898.1116952085. Note that the first 3 decimals are identical.

Adding to 724421040 its reverse (40124427), we get a palindrome (764545467).

The spelling of 724421040 in words is "seven hundred twenty-four million, four hundred twenty-one thousand, forty".