1390244 has 6 divisors (see below), whose sum is σ = 2432934. Its totient is φ = 695120.

The previous prime is 1390241. The next prime is 1390247. The reversal of 1390244 is 4420931.

It is an interprime number because it is at equal distance from previous prime (1390241) and next prime (1390247).

It can be written as a sum of positive squares in only one way, i.e., 1350244 + 40000 = 1162^2 + 200^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173777 + ... + 173784.

It is an arithmetic number, because the mean of its divisors is an integer number (405489).

2^1390244 is an apocalyptic number.

It is an amenable number.

1390244 is a deficient number, since it is larger than the sum of its proper divisors (1042690).

1390244 is a wasteful number, since it uses less digits than its factorization.

1390244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347565 (or 347563 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1390244 is about 1179.0860867638. The cubic root of 1390244 is about 111.6084327933.

The spelling of 1390244 in words is "one million, three hundred ninety thousand, two hundred forty-four".