25340040 has 224 divisors, whose sum is σ = 94435200. Its totient is φ = 6065280.

The previous prime is 25340039. The next prime is 25340057. The reversal of 25340040 is 4004352.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 25339995 and 25340022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 320721 + ... + 320799.

Almost surely, 2^25340040 is an apocalyptic number.

25340040 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 25340040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47217600).

25340040 is an abundant number, since it is smaller than the sum of its proper divisors (69095160).

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

25340040 is a wasteful number, since it uses less digits than its factorization.

25340040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 25340040 is about 5033.8891525341. The cubic root of 25340040 is about 293.7215188925.

Adding to 25340040 its reverse (4004352), we get a palindrome (29344392).

The spelling of 25340040 in words is "twenty-five million, three hundred forty thousand, forty".