4400139 has 4 divisors (see below), whose sum is σ = 5866856. Its totient is φ = 2933424.

The previous prime is 4400131. The next prime is 4400167. The reversal of 4400139 is 9310044.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4400139 - 2³ = 4400131 is a prime.

It is a super-2 number, since 2×4400139² = 38722446438642, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4400131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733354 + ... + 733359.

It is an arithmetic number, because the mean of its divisors is an integer number (1466714).

Almost surely, 2^4400139 is an apocalyptic number.

4400139 is a deficient number, since it is larger than the sum of its proper divisors (1466717).

4400139 is a wasteful number, since it uses less digits than its factorization.

4400139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466716.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 4400139 is about 2097.6508289036. The cubic root of 4400139 is about 163.8659796422.

The spelling of 4400139 in words is "four million, four hundred thousand, one hundred thirty-nine".