1389869810 has 48 divisors (see below), whose sum is σ = 3004128000. Its totient is φ = 461149920.

The previous prime is 1389869807. The next prime is 1389869821. The reversal of 1389869810 is 189689831.

It is a super-2 number, since 2×1389869810² = 3863476177498872200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30560 + ... + 60939.

It is an arithmetic number, because the mean of its divisors is an integer number (62586000).

Almost surely, 2^1389869810 is an apocalyptic number.

1389869810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389869810 is an abundant number, since it is smaller than the sum of its proper divisors (1614258190).

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

1389869810 is a wasteful number, since it uses less digits than its factorization.

1389869810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91551 (or 91544 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 53.

The square root of 1389869810 is about 37280.9577398435. The cubic root of 1389869810 is about 1115.9841860231.

The spelling of 1389869810 in words is "one billion, three hundred eighty-nine million, eight hundred sixty-nine thousand, eight hundred ten".