25257340 has 36 divisors (see below), whose sum is σ = 54382104. Its totient is φ = 9853536.

The previous prime is 25257329. The next prime is 25257361. The reversal of 25257340 is 4375252.

It is a junction number, because it is equal to n+sod(n) for n = 25257299 and 25257308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36639 + ... + 37321.

It is an arithmetic number, because the mean of its divisors is an integer number (1510614).

Almost surely, 2^25257340 is an apocalyptic number.

25257340 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 25257340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27191052).

25257340 is an abundant number, since it is smaller than the sum of its proper divisors (29124764).

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

25257340 is a wasteful number, since it uses less digits than its factorization.

25257340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 25257340 is about 5025.6681147883. The cubic root of 25257340 is about 293.4016398549.

The spelling of 25257340 in words is "twenty-five million, two hundred fifty-seven thousand, three hundred forty".