1389508435 has 16 divisors (see below), whose sum is σ = 1944504000. Its totient is φ = 952804608.

The previous prime is 1389508433. The next prime is 1389508441. The reversal of 1389508435 is 5348059831.

It is not a de Polignac number, because 1389508435 - 2¹ = 1389508433 is a prime.

It is a super-2 number, since 2×1389508435² = 3861467381872298450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1389508433) 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, 403390 + ... + 406819.

It is an arithmetic number, because the mean of its divisors is an integer number (121531500).

Almost surely, 2^1389508435 is an apocalyptic number.

1389508435 is a deficient number, since it is larger than the sum of its proper divisors (554995565).

1389508435 is an frugal number, since it uses more digits than its factorization.

1389508435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810235 (or 810221 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The square root of 1389508435 is about 37276.1107815716. The cubic root of 1389508435 is about 1115.8874566412.

The spelling of 1389508435 in words is "one billion, three hundred eighty-nine million, five hundred eight thousand, four hundred thirty-five".