1389900 has 72 divisors (see below), whose sum is σ = 4155984. Its totient is φ = 358400.

The previous prime is 1389893. The next prime is 1389911. The reversal of 1389900 is 99831.

1389900 = 50² + 51² + ... + 162².

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12244 + ... + 12356.

It is an arithmetic number, because the mean of its divisors is an integer number (57722).

2^1389900 is an apocalyptic number.

1389900 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 1389900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2077992).

1389900 is an abundant number, since it is smaller than the sum of its proper divisors (2766084).

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

1389900 is a wasteful number, since it uses less digits than its factorization.

1389900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1389900 is about 1178.9402020459. The cubic root of 1389900 is about 111.5992266233.

The spelling of 1389900 in words is "one million, three hundred eighty-nine thousand, nine hundred".