25529040 has 160 divisors (see below), whose sum is σ = 89994240. Its totient is φ = 6649344.

The previous prime is 25529039. The next prime is 25529051. The reversal of 25529040 is 4092552.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 25528995 and 25529013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114369 + ... + 114591.

It is an arithmetic number, because the mean of its divisors is an integer number (562464).

Almost surely, 2^25529040 is an apocalyptic number.

25529040 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 25529040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44997120).

25529040 is an abundant number, since it is smaller than the sum of its proper divisors (64465200).

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

25529040 is a wasteful number, since it uses less digits than its factorization.

25529040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 25529040 is about 5052.6270394716. The cubic root of 25529040 is about 294.4499565705.

The spelling of 25529040 in words is "twenty-five million, five hundred twenty-nine thousand, forty".