1320724734 has 48 divisors (see below), whose sum is σ = 3075811200. Its totient is φ = 376968816.

The previous prime is 1320724723. The next prime is 1320724777. The reversal of 1320724734 is 4374270231.

It is a junction number, because it is equal to n+sod(n) for n = 1320724695 and 1320724704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 427407 + ... + 430485.

It is an arithmetic number, because the mean of its divisors is an integer number (64079400).

Almost surely, 2^1320724734 is an apocalyptic number.

1320724734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1320724734 is an abundant number, since it is smaller than the sum of its proper divisors (1755086466).

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

1320724734 is a wasteful number, since it uses less digits than its factorization.

1320724734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4557 (or 4550 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 33.

The square root of 1320724734 is about 36341.7767039533. The cubic root of 1320724734 is about 1097.1620326345.

Adding to 1320724734 its reverse (4374270231), we get a palindrome (5694994965).

The spelling of 1320724734 in words is "one billion, three hundred twenty million, seven hundred twenty-four thousand, seven hundred thirty-four".