2109456 has 80 divisors (see below), whose sum is σ = 6398400. Its totient is φ = 663552.

The previous prime is 2109449. The next prime is 2109461. The reversal of 2109456 is 6549012.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8080 + ... + 8336.

It is an arithmetic number, because the mean of its divisors is an integer number (79980).

2^2109456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2109456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3199200).

2109456 is an abundant number, since it is smaller than the sum of its proper divisors (4288944).

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

2109456 is a wasteful number, since it uses less digits than its factorization.

2109456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2109456 is about 1452.3966400402. The cubic root of 2109456 is about 128.2498375566.

The spelling of 2109456 in words is "two million, one hundred nine thousand, four hundred fifty-six".