1339689240 has 128 divisors (see below), whose sum is σ = 4700736000. Its totient is φ = 338442624.

The previous prime is 1339689217. The next prime is 1339689277. The reversal of 1339689240 is 429869331.

It is a happy number.

1339689240 is a `hidden beast` number, since 13 + 396 + 8 + 9 + 240 = 666.

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 31 ways as a sum of consecutive naturals, for example, 12124 + ... + 53163.

It is an arithmetic number, because the mean of its divisors is an integer number (36724500).

Almost surely, 2^1339689240 is an apocalyptic number.

1339689240 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 1339689240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2350368000).

1339689240 is an abundant number, since it is smaller than the sum of its proper divisors (3361046760).

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

1339689240 is a wasteful number, since it uses less digits than its factorization.

1339689240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65326 (or 65316 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 1339689240 is about 36601.7655311872. The cubic root of 1339689240 is about 1102.3885397987.

The spelling of 1339689240 in words is "one billion, three hundred thirty-nine million, six hundred eighty-nine thousand, two hundred forty".