1389624 has 16 divisors (see below), whose sum is σ = 3474120. Its totient is φ = 463200.

The previous prime is 1389623. The next prime is 1389629. The reversal of 1389624 is 4269831.

It is a super-2 number, since 2×1389624² = 3862109722752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28927 + ... + 28974.

2^1389624 is an apocalyptic number.

It is an amenable number.

1389624 is an abundant number, since it is smaller than the sum of its proper divisors (2084496).

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

1389624 is a wasteful number, since it uses less digits than its factorization.

1389624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57910 (or 57906 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 1389624 is about 1178.8231419513. The cubic root of 1389624 is about 111.5918391792.

The spelling of 1389624 in words is "one million, three hundred eighty-nine thousand, six hundred twenty-four".