1309944 has 16 divisors (see below), whose sum is σ = 3274920. Its totient is φ = 436640.

The previous prime is 1309939. The next prime is 1309949. The reversal of 1309944 is 4499031.

It is an interprime number because it is at equal distance from previous prime (1309939) and next prime (1309949).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1309949) 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, 27267 + ... + 27314.

2^1309944 is an apocalyptic number.

It is an amenable number.

1309944 is an abundant number, since it is smaller than the sum of its proper divisors (1964976).

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

1309944 is a wasteful number, since it uses less digits than its factorization.

1309944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54590 (or 54586 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1309944 is about 1144.5278502509. The cubic root of 1309944 is about 109.4168589713.

The spelling of 1309944 in words is "one million, three hundred nine thousand, nine hundred forty-four".