25267440 has 160 divisors (see below), whose sum is σ = 90637056. Its totient is φ = 5754880.

The previous prime is 25267427. The next prime is 25267447. The reversal of 25267440 is 4476252.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 25267398 and 25267407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25267447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44599 + ... + 45161.

Almost surely, 2^25267440 is an apocalyptic number.

25267440 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 25267440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45318528).

25267440 is an abundant number, since it is smaller than the sum of its proper divisors (65369616).

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

25267440 is a wasteful number, since it uses less digits than its factorization.

25267440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 601 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 25267440 is about 5026.6728558759. The cubic root of 25267440 is about 293.4407434930.

25267440 divided by its sum of digits (30) gives a palindrome (842248).

The spelling of 25267440 in words is "twenty-five million, two hundred sixty-seven thousand, four hundred forty".