25740234 has 64 divisors (see below), whose sum is σ = 63329280. Its totient is φ = 7698240.

The previous prime is 25740203. The next prime is 25740257. The reversal of 25740234 is 43204752.

25740234 is a `hidden beast` number, since 257 + 402 + 3 + 4 = 666.

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

It is a Curzon number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 25740198 and 25740207.

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, 25479 + ... + 26469.

It is an arithmetic number, because the mean of its divisors is an integer number (989520).

Almost surely, 2^25740234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25740234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31664640).

25740234 is an abundant number, since it is smaller than the sum of its proper divisors (37589046).

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

25740234 is a wasteful number, since it uses less digits than its factorization.

25740234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052 (or 1046 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 25740234 is about 5073.4834187174. The cubic root of 25740234 is about 295.2596928001.

Adding to 25740234 its reverse (43204752), we get a palindrome (68944986).

The spelling of 25740234 in words is "twenty-five million, seven hundred forty thousand, two hundred thirty-four".