1389535590 has 32 divisors (see below), whose sum is σ = 3335904000. Its totient is φ = 370429664.

The previous prime is 1389535577. The next prime is 1389535591. The reversal of 1389535590 is 955359831.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389535591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149911 + ... + 158909.

It is an arithmetic number, because the mean of its divisors is an integer number (104247000).

Almost surely, 2^1389535590 is an apocalyptic number.

1389535590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389535590 is an abundant number, since it is smaller than the sum of its proper divisors (1946368410).

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

1389535590 is a wasteful number, since it uses less digits than its factorization.

1389535590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14156.

The product of its (nonzero) digits is 729000, while the sum is 48.

The square root of 1389535590 is about 37276.4750211175. The cubic root of 1389535590 is about 1115.8947258130.

The spelling of 1389535590 in words is "one billion, three hundred eighty-nine million, five hundred thirty-five thousand, five hundred ninety".