1390944 has 24 divisors (see below), whose sum is σ = 3651480. Its totient is φ = 463616.

The previous prime is 1390937. The next prime is 1390967. The reversal of 1390944 is 4490931.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1390944² = 3869450422272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7149 + ... + 7340.

It is an arithmetic number, because the mean of its divisors is an integer number (152145).

2^1390944 is an apocalyptic number.

It is an amenable number.

1390944 is an abundant number, since it is smaller than the sum of its proper divisors (2260536).

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

1390944 is a wasteful number, since it uses less digits than its factorization.

1390944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14502 (or 14494 counting only the distinct ones).

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

The square root of 1390944 is about 1179.3828894808. The cubic root of 1390944 is about 111.6271615906.

The spelling of 1390944 in words is "one million, three hundred ninety thousand, nine hundred forty-four".