1389405654 has 96 divisors (see below), whose sum is σ = 3734814720. Its totient is φ = 363496896.

The previous prime is 1389405617. The next prime is 1389405659. The reversal of 1389405654 is 4565049831.

1389405654 is a `hidden beast` number, since 1 + 3 + 89 + 4 + 0 + 565 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389405659) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 204687 + ... + 211365.

It is an arithmetic number, because the mean of its divisors is an integer number (38904320).

Almost surely, 2^1389405654 is an apocalyptic number.

1389405654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389405654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1867407360).

1389405654 is an abundant number, since it is smaller than the sum of its proper divisors (2345409066).

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

1389405654 is a wasteful number, since it uses less digits than its factorization.

1389405654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6834 (or 6831 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 1389405654 is about 37274.7321117134. The cubic root of 1389405654 is about 1115.8599421491.

The spelling of 1389405654 in words is "one billion, three hundred eighty-nine million, four hundred five thousand, six hundred fifty-four".