25849920 has 56 divisors (see below), whose sum is σ = 82076544. Its totient is φ = 6893056.

The previous prime is 25849919. The next prime is 25849921. The reversal of 25849920 is 2994852.

It is an interprime number because it is at equal distance from previous prime (25849919) and next prime (25849921).

It is not an unprimeable number, because it can be changed into a prime (25849921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12504 + ... + 14423.

Almost surely, 2^25849920 is an apocalyptic number.

25849920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25849920 is an abundant number, since it is smaller than the sum of its proper divisors (56226624).

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

25849920 is a wasteful number, since it uses less digits than its factorization.

25849920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26947 (or 26937 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 25849920 is about 5084.2816601758. The cubic root of 25849920 is about 295.6784919152.

The spelling of 25849920 in words is "twenty-five million, eight hundred forty-nine thousand, nine hundred twenty".