25964280 has 128 divisors (see below), whose sum is σ = 89640000. Its totient is φ = 6676992.

The previous prime is 25964273. The next prime is 25964347. The reversal of 25964280 is 8246952.

It is a happy number.

25964280 is a `hidden beast` number, since 2 + 5 + 9 + 642 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30906 + ... + 31734.

Almost surely, 2^25964280 is an apocalyptic number.

25964280 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 25964280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44820000).

25964280 is an abundant number, since it is smaller than the sum of its proper divisors (63675720).

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

25964280 is a wasteful number, since it uses less digits than its factorization.

25964280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 25964280 is about 5095.5156755720. The cubic root of 25964280 is about 296.1138775370.

It can be divided in two parts, 25964 and 280, that added together give a square (26244 = 162²).

The spelling of 25964280 in words is "twenty-five million, nine hundred sixty-four thousand, two hundred eighty".