1397644 has 6 divisors (see below), whose sum is σ = 2445884. Its totient is φ = 698820.

The previous prime is 1397633. The next prime is 1397657. The reversal of 1397644 is 4467931.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174702 + ... + 174709.

2^1397644 is an apocalyptic number.

It is an amenable number.

1397644 is a deficient number, since it is larger than the sum of its proper divisors (1048240).

1397644 is a wasteful number, since it uses less digits than its factorization.

1397644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349415 (or 349413 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 1397644 is about 1182.2199456954. The cubic root of 1397644 is about 111.8061058511.

The spelling of 1397644 in words is "one million, three hundred ninety-seven thousand, six hundred forty-four".