139594940 has 24 divisors (see below), whose sum is σ = 294794640. Its totient is φ = 55524608.

The previous prime is 139594927. The next prime is 139594943. The reversal of 139594940 is 49495931.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 139594891 and 139594900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139594943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15917 + ... + 23076.

It is an arithmetic number, because the mean of its divisors is an integer number (12283110).

Almost surely, 2^139594940 is an apocalyptic number.

139594940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139594940 is an abundant number, since it is smaller than the sum of its proper divisors (155199700).

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

139594940 is a wasteful number, since it uses less digits than its factorization.

139594940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39181 (or 39179 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 139594940 is about 11815.0302581077. The cubic root of 139594940 is about 518.7481474749.

Subtracting from 139594940 its reverse (49495931), we obtain a palindrome (90099009).

The spelling of 139594940 in words is "one hundred thirty-nine million, five hundred ninety-four thousand, nine hundred forty".