25009740 has 144 divisors (see below), whose sum is σ = 90574848. Its totient is φ = 5461632.

The previous prime is 25009667. The next prime is 25009759. The reversal of 25009740 is 4790052.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28549 + ... + 29411.

It is an arithmetic number, because the mean of its divisors is an integer number (628992).

Almost surely, 2^25009740 is an apocalyptic number.

25009740 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 25009740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45287424).

25009740 is an abundant number, since it is smaller than the sum of its proper divisors (65565108).

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

25009740 is a wasteful number, since it uses less digits than its factorization.

25009740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 25009740 is about 5000.9739051509. The cubic root of 25009740 is about 292.4397421346.

Adding to 25009740 its reverse (4790052), we get a palindrome (29799792).

The spelling of 25009740 in words is "twenty-five million, nine thousand, seven hundred forty".