1398744 has 24 divisors (see below), whose sum is σ = 3788460. Its totient is φ = 466224.

The previous prime is 1398737. The next prime is 1398763. The reversal of 1398744 is 4478931.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1398699 and 1398708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9642 + ... + 9785.

2^1398744 is an apocalyptic number.

It is an amenable number.

1398744 is an abundant number, since it is smaller than the sum of its proper divisors (2389716).

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

1398744 is a wasteful number, since it uses less digits than its factorization.

1398744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19439 (or 19432 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1398744 is about 1182.6850806533. The cubic root of 1398744 is about 111.8354300723.

The spelling of 1398744 in words is "one million, three hundred ninety-eight thousand, seven hundred forty-four".