1389150440 has 32 divisors (see below), whose sum is σ = 3135797280. Its totient is φ = 553845312.

The previous prime is 1389150419. The next prime is 1389150473. The reversal of 1389150440 is 440519831.

It is a self number, because there is not a number n which added to its sum of digits gives 1389150440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44282 + ... + 68841.

It is an arithmetic number, because the mean of its divisors is an integer number (97993665).

Almost surely, 2^1389150440 is an apocalyptic number.

1389150440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389150440 is an abundant number, since it is smaller than the sum of its proper divisors (1746646840).

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

1389150440 is a wasteful number, since it uses less digits than its factorization.

1389150440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113441 (or 113437 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 1389150440 is about 37271.3085361917. The cubic root of 1389150440 is about 1115.7916154472.

The spelling of 1389150440 in words is "one billion, three hundred eighty-nine million, one hundred fifty thousand, four hundred forty".