1389880 has 16 divisors (see below), whose sum is σ = 3127320. Its totient is φ = 555936.

The previous prime is 1389877. The next prime is 1389887. The reversal of 1389880 is 889831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17334 + ... + 17413.

2^1389880 is an apocalyptic number.

1389880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389880 is an abundant number, since it is smaller than the sum of its proper divisors (1737440).

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

1389880 is a wasteful number, since it uses less digits than its factorization.

1389880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34758 (or 34754 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1389880 is about 1178.9317198210. The cubic root of 1389880 is about 111.5986913341.

The spelling of 1389880 in words is "one million, three hundred eighty-nine thousand, eight hundred eighty".