1389284140 has 48 divisors (see below), whose sum is σ = 3001156704. Its totient is φ = 539827200.

The previous prime is 1389284137. The next prime is 1389284167. The reversal of 1389284140 is 414829831.

It is a super-2 number, since 2×1389284140² = 3860220843311079200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1389284093 and 1389284102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 650875 + ... + 653005.

It is an arithmetic number, because the mean of its divisors is an integer number (62524098).

Almost surely, 2^1389284140 is an apocalyptic number.

1389284140 is a gapful number since it is divisible by the number (10) 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 1389284140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500578352).

1389284140 is an abundant number, since it is smaller than the sum of its proper divisors (1611872564).

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

1389284140 is a wasteful number, since it uses less digits than its factorization.

1389284140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3058 (or 3056 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 1389284140 is about 37273.1020978936. The cubic root of 1389284140 is about 1115.8274110790.

The spelling of 1389284140 in words is "one billion, three hundred eighty-nine million, two hundred eighty-four thousand, one hundred forty".