704721540 has 24 divisors (see below), whose sum is σ = 1973220480. Its totient is φ = 187925728.

The previous prime is 704721503. The next prime is 704721569. The reversal of 704721540 is 45127407.

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 = 704721498 and 704721507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5872620 + ... + 5872739.

It is an arithmetic number, because the mean of its divisors is an integer number (82217520).

Almost surely, 2^704721540 is an apocalyptic number.

It is an amenable number.

704721540 is an abundant number, since it is smaller than the sum of its proper divisors (1268498940).

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

704721540 is a wasteful number, since it uses less digits than its factorization.

704721540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11745371 (or 11745369 counting only the distinct ones).

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

The square root of 704721540 is about 26546.5918716509. The cubic root of 704721540 is about 889.8958511298.

Adding to 704721540 its reverse (45127407), we get a palindrome (749848947).

The spelling of 704721540 in words is "seven hundred four million, seven hundred twenty-one thousand, five hundred forty".