1389892446 has 112 divisors (see below), whose sum is σ = 3324119040. Its totient is φ = 434425680.

The previous prime is 1389892423. The next prime is 1389892447. The reversal of 1389892446 is 6442989831.

It is a super-2 number, since 2×1389892446² = 3863602022895725832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1389892392 and 1389892401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389892447) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3628771 + ... + 3629153.

Almost surely, 2^1389892446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389892446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1662059520).

1389892446 is an abundant number, since it is smaller than the sum of its proper divisors (1934226594).

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

1389892446 is a wasteful number, since it uses less digits than its factorization.

1389892446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 538 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 1389892446 is about 37281.2613252288. The cubic root of 1389892446 is about 1115.9902444517.

The spelling of 1389892446 in words is "one billion, three hundred eighty-nine million, eight hundred ninety-two thousand, four hundred forty-six".