1389409200 has 600 divisors, whose sum is σ = 5479160720. Its totient is φ = 335923200.

The previous prime is 1389409199. The next prime is 1389409213. The reversal of 1389409200 is 29049831.

It is a tau number, because it is divible by the number of its divisors (600).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 22777170 + ... + 22777230.

Almost surely, 2^1389409200 is an apocalyptic number.

1389409200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1389409200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2739580360).

1389409200 is an abundant number, since it is smaller than the sum of its proper divisors (4089751520).

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

1389409200 is a wasteful number, since it uses less digits than its factorization.

1389409200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1389409200 is about 37274.7796774173. The cubic root of 1389409200 is about 1115.8608914365.

The spelling of 1389409200 in words is "one billion, three hundred eighty-nine million, four hundred nine thousand, two hundred".