139444 has 12 divisors (see below), whose sum is σ = 247968. Its totient is φ = 68600.

The previous prime is 139439. The next prime is 139457. The reversal of 139444 is 444931.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

139444 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39 + ... + 529.

It is an arithmetic number, because the mean of its divisors is an integer number (20664).

2¹³⁹⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

139444 is a deficient number, since it is larger than the sum of its proper divisors (108524).

139444 is a wasteful number, since it uses less digits than its factorization.

139444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 564 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 139444 is about 373.4220132772. The cubic root of 139444 is about 51.8561110888.

It can be divided in two parts, 139 and 444, that multiplied together give a palindrome (61716).

The spelling of 139444 in words is "one hundred thirty-nine thousand, four hundred forty-four".