25119640 has 128 divisors (see below), whose sum is σ = 71285760. Its totient is φ = 7755264.

The previous prime is 25119631. The next prime is 25119649. The reversal of 25119640 is 4691152.

It is an interprime number because it is at equal distance from previous prime (25119631) and next prime (25119649).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 25119599 and 25119608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25119649) 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, 243829 + ... + 243931.

It is an arithmetic number, because the mean of its divisors is an integer number (556920).

Almost surely, 2^25119640 is an apocalyptic number.

25119640 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 25119640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35642880).

25119640 is an abundant number, since it is smaller than the sum of its proper divisors (46166120).

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

25119640 is a wasteful number, since it uses less digits than its factorization.

25119640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 25119640 is about 5011.9497204182. The cubic root of 25119640 is about 292.8674710388.

25119640 divided by its sum of digits (28) gives a triangular number (897130 = T₁₃₃₉).

It can be divided in two parts, 251 and 19640, that added together give a palindrome (19891).

The spelling of 25119640 in words is "twenty-five million, one hundred nineteen thousand, six hundred forty".