2189400 has 96 divisors (see below), whose sum is σ = 7030800. Its totient is φ = 563200.

The previous prime is 2189399. The next prime is 2189417. The reversal of 2189400 is 49812.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 24556 + ... + 24644.

2^2189400 is an apocalyptic number.

2189400 is a gapful number since it is divisible by the number (20) 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 2189400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3515400).

2189400 is an abundant number, since it is smaller than the sum of its proper divisors (4841400).

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

2189400 is a wasteful number, since it uses less digits than its factorization.

2189400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2189400 is about 1479.6621235944. The cubic root of 2189400 is about 129.8499254370.

The spelling of 2189400 in words is "two million, one hundred eighty-nine thousand, four hundred".