2543904 has 108 divisors (see below), whose sum is σ = 8060598. Its totient is φ = 760320.

The previous prime is 2543899. The next prime is 2543917. The reversal of 2543904 is 4093452.

It can be written as a sum of positive squares in only one way, i.e., 2108304 + 435600 = 1452^2 + 660^2 .

It is a super-2 number, since 2×2543904² = 12942895122432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34812 + ... + 34884.

2^2543904 is an apocalyptic number.

2543904 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 2543904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4030299).

2543904 is an abundant number, since it is smaller than the sum of its proper divisors (5516694).

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

2543904 is a wasteful number, since it uses less digits than its factorization.

2543904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2543904 is about 1594.9620685145. The cubic root of 2543904 is about 136.5107667714.

The spelling of 2543904 in words is "two million, five hundred forty-three thousand, nine hundred four".