25285040 has 80 divisors (see below), whose sum is σ = 65352960. Its totient is φ = 9020160.

The previous prime is 25285031. The next prime is 25285061. The reversal of 25285040 is 4058252.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51677 + ... + 52163.

It is an arithmetic number, because the mean of its divisors is an integer number (816912).

Almost surely, 2^25285040 is an apocalyptic number.

25285040 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 25285040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32676480).

25285040 is an abundant number, since it is smaller than the sum of its proper divisors (40067920).

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

25285040 is a wasteful number, since it uses less digits than its factorization.

25285040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 25285040 is about 5028.4232121014. The cubic root of 25285040 is about 293.5088595932.

The spelling of 25285040 in words is "twenty-five million, two hundred eighty-five thousand, forty".