724701540 has 48 divisors (see below), whose sum is σ = 2030333760. Its totient is φ = 193142400.

The previous prime is 724701521. The next prime is 724701541. The reversal of 724701540 is 45107427.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 724701498 and 724701507.

It is not an unprimeable number, because it can be changed into a prime (724701541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196231 + ... + 199889.

It is an arithmetic number, because the mean of its divisors is an integer number (42298620).

Almost surely, 2^724701540 is an apocalyptic number.

It is an amenable number.

724701540 is an abundant number, since it is smaller than the sum of its proper divisors (1305632220).

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

724701540 is a wasteful number, since it uses less digits than its factorization.

724701540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6972 (or 6970 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 724701540 is about 26920.2812020974. The cubic root of 724701540 is about 898.2275982578.

Adding to 724701540 its reverse (45107427), we get a palindrome (769808967).

The spelling of 724701540 in words is "seven hundred twenty-four million, seven hundred one thousand, five hundred forty".