25305340 has 24 divisors (see below), whose sum is σ = 55938960. Its totient is φ = 9589248.

The previous prime is 25305337. The next prime is 25305353. The reversal of 25305340 is 4350352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32917 + ... + 33676.

It is an arithmetic number, because the mean of its divisors is an integer number (2330790).

Almost surely, 2^25305340 is an apocalyptic number.

25305340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25305340 is an abundant number, since it is smaller than the sum of its proper divisors (30633620).

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

25305340 is a wasteful number, since it uses less digits than its factorization.

25305340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66621 (or 66619 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 25305340 is about 5030.4413325274. The cubic root of 25305340 is about 293.5873860796.

Adding to 25305340 its reverse (4350352), we get a palindrome (29655692).

The spelling of 25305340 in words is "twenty-five million, three hundred five thousand, three hundred forty".