25226340 has 24 divisors (see below), whose sum is σ = 70633920. Its totient is φ = 6727008.

The previous prime is 25226329. The next prime is 25226347. The reversal of 25226340 is 4362252.

It is a self number, because there is not a number n which added to its sum of digits gives 25226340.

It is not an unprimeable number, because it can be changed into a prime (25226347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210160 + ... + 210279.

It is an arithmetic number, because the mean of its divisors is an integer number (2943080).

Almost surely, 2^25226340 is an apocalyptic number.

25226340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25226340 is an abundant number, since it is smaller than the sum of its proper divisors (45407580).

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

25226340 is a wasteful number, since it uses less digits than its factorization.

25226340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420451 (or 420449 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 25226340 is about 5022.5830008075. The cubic root of 25226340 is about 293.2815536473.

Adding to 25226340 its reverse (4362252), we get a palindrome (29588592).

The spelling of 25226340 in words is "twenty-five million, two hundred twenty-six thousand, three hundred forty".