25784340 has 48 divisors (see below), whose sum is σ = 72854208. Its totient is φ = 6813184.

The previous prime is 25784333. The next prime is 25784351. The reversal of 25784340 is 4348752.

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, 4879 + ... + 8681.

It is an arithmetic number, because the mean of its divisors is an integer number (1517796).

Almost surely, 2^25784340 is an apocalyptic number.

25784340 is a gapful number since it is divisible by the number (20) 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 25784340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36427104).

25784340 is an abundant number, since it is smaller than the sum of its proper divisors (47069868).

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

25784340 is a wasteful number, since it uses less digits than its factorization.

25784340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3928 (or 3926 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 25784340 is about 5077.8282759463. The cubic root of 25784340 is about 295.4282394797.

The spelling of 25784340 in words is "twenty-five million, seven hundred eighty-four thousand, three hundred forty".