25247040 has 336 divisors, whose sum is σ = 104802432. Its totient is φ = 5013504.

The previous prime is 25247017. The next prime is 25247041. The reversal of 25247040 is 4074252.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25247040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25247041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1485112 + ... + 1485128.

It is an arithmetic number, because the mean of its divisors is an integer number (311912).

Almost surely, 2^25247040 is an apocalyptic number.

25247040 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 25247040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52401216).

25247040 is an abundant number, since it is smaller than the sum of its proper divisors (79555392).

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

25247040 is a wasteful number, since it uses less digits than its factorization.

25247040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 25247040 is about 5024.6432709198. The cubic root of 25247040 is about 293.3617511495.

The spelling of 25247040 in words is "twenty-five million, two hundred forty-seven thousand, forty".