25949784 has 64 divisors (see below), whose sum is σ = 75075840. Its totient is φ = 7320960.

The previous prime is 25949779. The next prime is 25949797. The reversal of 25949784 is 48794952.

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, 13014 + ... + 14874.

It is an arithmetic number, because the mean of its divisors is an integer number (1173060).

Almost surely, 2^25949784 is an apocalyptic number.

25949784 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 25949784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37537920).

25949784 is an abundant number, since it is smaller than the sum of its proper divisors (49126056).

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

25949784 is a wasteful number, since it uses less digits than its factorization.

25949784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960 (or 1956 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 25949784 is about 5094.0930497980. The cubic root of 25949784 is about 296.0587599440.

The spelling of 25949784 in words is "twenty-five million, nine hundred forty-nine thousand, seven hundred eighty-four".