25640214 has 16 divisors (see below), whose sum is σ = 51507120. Its totient is φ = 8508960.

The previous prime is 25640213. The next prime is 25640221. The reversal of 25640214 is 41204652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25640213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7957 + ... + 10704.

It is an arithmetic number, because the mean of its divisors is an integer number (3219195).

Almost surely, 2^25640214 is an apocalyptic number.

25640214 is an abundant number, since it is smaller than the sum of its proper divisors (25866906).

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

25640214 is a wasteful number, since it uses less digits than its factorization.

25640214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18895.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 25640214 is about 5063.6166916543. The cubic root of 25640214 is about 294.8767616998.

Adding to 25640214 its reverse (41204652), we get a palindrome (66844866).

It can be divided in two parts, 256 and 40214, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 25640214 in words is "twenty-five million, six hundred forty thousand, two hundred fourteen".