25951920 has 80 divisors (see below), whose sum is σ = 81637632. Its totient is φ = 6818560.

The previous prime is 25951909. The next prime is 25951921. The reversal of 25951920 is 2915952.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25951921) 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, 16279 + ... + 17801.

Almost surely, 2^25951920 is an apocalyptic number.

25951920 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 25951920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40818816).

25951920 is an abundant number, since it is smaller than the sum of its proper divisors (55685712).

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

25951920 is a wasteful number, since it uses less digits than its factorization.

25951920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610 (or 1604 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 25951920 is about 5094.3027000758. The cubic root of 25951920 is about 296.0668828654.

The spelling of 25951920 in words is "twenty-five million, nine hundred fifty-one thousand, nine hundred twenty".