1398024 has 24 divisors (see below), whose sum is σ = 3786510. Its totient is φ = 465984.

The previous prime is 1398017. The next prime is 1398031. The reversal of 1398024 is 4208931.

It is an interprime number because it is at equal distance from previous prime (1398017) and next prime (1398031).

It can be written as a sum of positive squares in only one way, i.e., 1397124 + 900 = 1182^2 + 30^2 .

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

It is a super-2 number, since 2×1398024² = 3908942209152, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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, 9637 + ... + 9780.

2^1398024 is an apocalyptic number.

It is an amenable number.

1398024 is an abundant number, since it is smaller than the sum of its proper divisors (2388486).

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

1398024 is a wasteful number, since it uses less digits than its factorization.

1398024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19429 (or 19422 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1398024 is about 1182.3806493680. The cubic root of 1398024 is about 111.8162377756.

The spelling of 1398024 in words is "one million, three hundred ninety-eight thousand, twenty-four".