1339668720 has 640 divisors, whose sum is σ = 5466316800. Its totient is φ = 302330880.

The previous prime is 1339668719. The next prime is 1339668761. The reversal of 1339668720 is 278669331.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 43215105 + ... + 43215135.

It is an arithmetic number, because the mean of its divisors is an integer number (8541120).

Almost surely, 2^1339668720 is an apocalyptic number.

1339668720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1339668720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2733158400).

1339668720 is an abundant number, since it is smaller than the sum of its proper divisors (4126648080).

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

1339668720 is a wasteful number, since it uses less digits than its factorization.

1339668720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1339668720 is about 36601.4852157669. The cubic root of 1339668720 is about 1102.3829113470.

The spelling of 1339668720 in words is "one billion, three hundred thirty-nine million, six hundred sixty-eight thousand, seven hundred twenty".