1389439800 has 144 divisors (see below), whose sum is σ = 5332850640. Its totient is φ = 317583360.

The previous prime is 1389439789. The next prime is 1389439823. The reversal of 1389439800 is 89349831.

1389439800 is a `hidden beast` number, since 138 + 9 + 439 + 80 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42537 + ... + 67736.

It is an arithmetic number, because the mean of its divisors is an integer number (37033685).

Almost surely, 2^1389439800 is an apocalyptic number.

1389439800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389439800 is an abundant number, since it is smaller than the sum of its proper divisors (3943410840).

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

1389439800 is a wasteful number, since it uses less digits than its factorization.

1389439800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110302 (or 110290 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1389439800 is about 37275.1901403601. The cubic root of 1389439800 is about 1115.8690831899.

The spelling of 1389439800 in words is "one billion, three hundred eighty-nine million, four hundred thirty-nine thousand, eight hundred".