139992768 has 84 divisors (see below), whose sum is σ = 402976080. Its totient is φ = 46465536.

The previous prime is 139992761. The next prime is 139992791. The reversal of 139992768 is 867299931.

It is not an unprimeable number, because it can be changed into a prime (139992761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206446 + ... + 207122.

Almost surely, 2^139992768 is an apocalyptic number.

139992768 is a gapful number since it is divisible by the number (18) 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 139992768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201488040).

139992768 is an abundant number, since it is smaller than the sum of its proper divisors (262983312).

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

139992768 is a wasteful number, since it uses less digits than its factorization.

139992768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054 (or 1041 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 139992768 is about 11831.8539544739. The cubic root of 139992768 is about 519.2404690508.

The spelling of 139992768 in words is "one hundred thirty-nine million, nine hundred ninety-two thousand, seven hundred sixty-eight".