139069440 has 192 divisors, whose sum is σ = 495331200. Its totient is φ = 37011456.

The previous prime is 139069433. The next prime is 139069459. The reversal of 139069440 is 44960931.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 139069395 and 139069404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276229 + ... + 276731.

It is an arithmetic number, because the mean of its divisors is an integer number (2579850).

Almost surely, 2^139069440 is an apocalyptic number.

139069440 is a gapful number since it is divisible by the number (10) 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 139069440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247665600).

139069440 is an abundant number, since it is smaller than the sum of its proper divisors (356261760).

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

139069440 is an equidigital number, since it uses as much as digits as its factorization.

139069440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 139069440 is about 11792.7706668111. The cubic root of 139069440 is about 518.0963928683.

The spelling of 139069440 in words is "one hundred thirty-nine million, sixty-nine thousand, four hundred forty".