1339432640 has 168 divisors, whose sum is σ = 3996275472. Its totient is φ = 423843840.

The previous prime is 1339432639. The next prime is 1339432643. The reversal of 1339432640 is 462349331.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1339432640.

It is not an unprimeable number, because it can be changed into a prime (1339432643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200555 + ... + 207125.

It is an arithmetic number, because the mean of its divisors is an integer number (23787354).

Almost surely, 2^1339432640 is an apocalyptic number.

1339432640 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 1339432640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1998137736).

1339432640 is an abundant number, since it is smaller than the sum of its proper divisors (2656842832).

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

1339432640 is a wasteful number, since it uses less digits than its factorization.

1339432640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615 (or 6598 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 1339432640 is about 36598.2600679322. The cubic root of 1339432640 is about 1102.3181525892.

The spelling of 1339432640 in words is "one billion, three hundred thirty-nine million, four hundred thirty-two thousand, six hundred forty".