724491740 has 24 divisors (see below), whose sum is σ = 1738780512. Its totient is φ = 248397120.

The previous prime is 724491727. The next prime is 724491763. The reversal of 724491740 is 47194427.

It is a junction number, because it is equal to n+sod(n) for n = 724491694 and 724491703.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2587331 + ... + 2587610.

It is an arithmetic number, because the mean of its divisors is an integer number (72449188).

Almost surely, 2^724491740 is an apocalyptic number.

724491740 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

724491740 is an abundant number, since it is smaller than the sum of its proper divisors (1014288772).

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

724491740 is a wasteful number, since it uses less digits than its factorization.

724491740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174957 (or 5174955 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 724491740 is about 26916.3842296843. The cubic root of 724491740 is about 898.1409113815.

The spelling of 724491740 in words is "seven hundred twenty-four million, four hundred ninety-one thousand, seven hundred forty".