1339978892 has 90 divisors (see below), whose sum is σ = 2837760324. Its totient is φ = 553519680.

The previous prime is 1339978877. The next prime is 1339978897. The reversal of 1339978892 is 2988799331.

It is not an unprimeable number, because it can be changed into a prime (1339978897) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 16144283 + ... + 16144365.

Almost surely, 2^1339978892 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1339978892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1418880162).

1339978892 is an abundant number, since it is smaller than the sum of its proper divisors (1497781432).

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

1339978892 is an frugal number, since it uses more digits than its factorization.

1339978892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 133 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 59.

The square root of 1339978892 is about 36605.7221210018. The cubic root of 1339978892 is about 1102.4679826093.

The spelling of 1339978892 in words is "one billion, three hundred thirty-nine million, nine hundred seventy-eight thousand, eight hundred ninety-two".