1389285072 has 120 divisors (see below), whose sum is σ = 4451750784. Its totient is φ = 396202752.

The previous prime is 1389285019. The next prime is 1389285083. The reversal of 1389285072 is 2705829831.

It is a happy number.

1389285072 is a `hidden beast` number, since 138 + 9 + 2 + 8 + 507 + 2 = 666.

It is a super-2 number, since 2×1389285072² = 3860226022564090368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 778293 + ... + 780075.

Almost surely, 2^1389285072 is an apocalyptic number.

1389285072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389285072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2225875392).

1389285072 is an abundant number, since it is smaller than the sum of its proper divisors (3062465712).

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

1389285072 is a wasteful number, since it uses less digits than its factorization.

1389285072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577 (or 2568 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1389285072 is about 37273.1146002048. The cubic root of 1389285072 is about 1115.8276605962.

The spelling of 1389285072 in words is "one billion, three hundred eighty-nine million, two hundred eighty-five thousand, seventy-two".