2195784 has 24 divisors (see below), whose sum is σ = 5947110. Its totient is φ = 731904.

The previous prime is 2195777. The next prime is 2195801. The reversal of 2195784 is 4875912.

It can be written as a sum of positive squares in only one way, i.e., 1633284 + 562500 = 1278^2 + 750^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15177 + ... + 15320.

2^2195784 is an apocalyptic number.

2195784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2195784 is an abundant number, since it is smaller than the sum of its proper divisors (3751326).

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

2195784 is a wasteful number, since it uses less digits than its factorization.

2195784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30509 (or 30502 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 2195784 is about 1481.8178025655. The cubic root of 2195784 is about 129.9760113528.

The spelling of 2195784 in words is "two million, one hundred ninety-five thousand, seven hundred eighty-four".