25642344 has 128 divisors (see below), whose sum is σ = 80640000. Its totient is φ = 6614784.

The previous prime is 25642327. The next prime is 25642399. The reversal of 25642344 is 44324652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128757 + ... + 128955.

It is an arithmetic number, because the mean of its divisors is an integer number (630000).

Almost surely, 2^25642344 is an apocalyptic number.

25642344 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 25642344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40320000).

25642344 is an abundant number, since it is smaller than the sum of its proper divisors (54997656).

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

25642344 is a wasteful number, since it uses less digits than its factorization.

25642344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 283 counting only the distinct ones).

The product of its digits is 23040, while the sum is 30.

The square root of 25642344 is about 5063.8270112633. The cubic root of 25642344 is about 294.8849268697.

Adding to 25642344 its reverse (44324652), we get a palindrome (69966996).

The spelling of 25642344 in words is "twenty-five million, six hundred forty-two thousand, three hundred forty-four".