139081872 has 80 divisors (see below), whose sum is σ = 373944320. Its totient is φ = 44496000.

The previous prime is 139081867. The next prime is 139081889. The reversal of 139081872 is 278180931.

It is a self number, because there is not a number n which added to its sum of digits gives 139081872.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224379 + ... + 224997.

It is an arithmetic number, because the mean of its divisors is an integer number (4674304).

Almost surely, 2^139081872 is an apocalyptic number.

139081872 is a gapful number since it is divisible by the number (12) 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 139081872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186972160).

139081872 is an abundant number, since it is smaller than the sum of its proper divisors (234862448).

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

139081872 is a wasteful number, since it uses less digits than its factorization.

139081872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 139081872 is about 11793.2977576249. The cubic root of 139081872 is about 518.1118306775. Note that the first 3 decimals are identical.

The spelling of 139081872 in words is "one hundred thirty-nine million, eighty-one thousand, eight hundred seventy-two".