25906380 has 48 divisors (see below), whose sum is σ = 73198944. Its totient is φ = 6845440.

The previous prime is 25906379. The next prime is 25906381. The reversal of 25906380 is 8360952.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25906379) and next prime (25906381).

It is a super-2 number, since 2×25906380² = 1342281049408800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25906381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4870 + ... + 8690.

It is an arithmetic number, because the mean of its divisors is an integer number (1524978).

Almost surely, 2^25906380 is an apocalyptic number.

25906380 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 25906380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36599472).

25906380 is an abundant number, since it is smaller than the sum of its proper divisors (47292564).

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

25906380 is a wasteful number, since it uses less digits than its factorization.

25906380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3946 (or 3944 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 25906380 is about 5089.8310384530. The cubic root of 25906380 is about 295.8936037135.

The spelling of 25906380 in words is "twenty-five million, nine hundred six thousand, three hundred eighty".