139967984 has 80 divisors (see below), whose sum is σ = 311230080. Its totient is φ = 60445440.

The previous prime is 139967983. The next prime is 139968011. The reversal of 139967984 is 489769931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139967983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422699 + ... + 423029.

It is an arithmetic number, because the mean of its divisors is an integer number (3890376).

Almost surely, 2^139967984 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 139967984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155615040).

139967984 is an abundant number, since it is smaller than the sum of its proper divisors (171262096).

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

139967984 is a wasteful number, since it uses less digits than its factorization.

139967984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 472 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 56.

The square root of 139967984 is about 11830.8065659109. The cubic root of 139967984 is about 519.2098255267.

The spelling of 139967984 in words is "one hundred thirty-nine million, nine hundred sixty-seven thousand, nine hundred eighty-four".