1398366 has 12 divisors (see below), whose sum is σ = 3029832. Its totient is φ = 466116.

The previous prime is 1398349. The next prime is 1398367. The reversal of 1398366 is 6638931.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1398366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38826 + ... + 38861.

It is an arithmetic number, because the mean of its divisors is an integer number (252486).

2^1398366 is an apocalyptic number.

1398366 is an abundant number, since it is smaller than the sum of its proper divisors (1631466).

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

1398366 is a wasteful number, since it uses less digits than its factorization.

1398366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77695 (or 77692 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 1398366 is about 1182.5252640007. The cubic root of 1398366 is about 111.8253549380.

It can be divided in two parts, 1398 and 366, that added together give a square (1764 = 42²).

The spelling of 1398366 in words is "one million, three hundred ninety-eight thousand, three hundred sixty-six".