139740288 has 128 divisors (see below), whose sum is σ = 396576000. Its totient is φ = 43471872.

The previous prime is 139740287. The next prime is 139740301. The reversal of 139740288 is 882047931.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (139740287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780583 + ... + 780761.

It is an arithmetic number, because the mean of its divisors is an integer number (3098250).

Almost surely, 2^139740288 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 139740288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198288000).

139740288 is an abundant number, since it is smaller than the sum of its proper divisors (256835712).

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

139740288 is a wasteful number, since it uses less digits than its factorization.

139740288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 139740288 is about 11821.1796365676. The cubic root of 139740288 is about 518.9281273798.

The spelling of 139740288 in words is "one hundred thirty-nine million, seven hundred forty thousand, two hundred eighty-eight".