2321904 has 60 divisors (see below), whose sum is σ = 6567288. Its totient is φ = 702720.

The previous prime is 2321899. The next prime is 2321909. The reversal of 2321904 is 4091232.

It is an interprime number because it is at equal distance from previous prime (2321899) and next prime (2321909).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38034 + ... + 38094.

2^2321904 is an apocalyptic number.

2321904 is a gapful number since it is divisible by the number (24) 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 2321904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3283644).

2321904 is an abundant number, since it is smaller than the sum of its proper divisors (4245384).

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

2321904 is a wasteful number, since it uses less digits than its factorization.

2321904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 2321904 is about 1523.7795116092. The cubic root of 2321904 is about 132.4183239365.

The spelling of 2321904 in words is "two million, three hundred twenty-one thousand, nine hundred four".