25904220 has 96 divisors (see below), whose sum is σ = 78919680. Its totient is φ = 6324480.

The previous prime is 25904213. The next prime is 25904231. The reversal of 25904220 is 2240952.

It is a super-2 number, since 2×25904220² = 1342057227616800, which contains 22 as substring.

It is a congruent number.

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, 34974 + ... + 35706.

It is an arithmetic number, because the mean of its divisors is an integer number (822080).

Almost surely, 2^25904220 is an apocalyptic number.

25904220 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 25904220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39459840).

25904220 is an abundant number, since it is smaller than the sum of its proper divisors (53015460).

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

25904220 is a wasteful number, since it uses less digits than its factorization.

25904220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 25904220 is about 5089.6188462399. The cubic root of 25904220 is about 295.8853798970.

The spelling of 25904220 in words is "twenty-five million, nine hundred four thousand, two hundred twenty".