25440085 has 8 divisors (see below), whose sum is σ = 33303456. Its totient is φ = 18501840.

The previous prime is 25440083. The next prime is 25440091. The reversal of 25440085 is 58004452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25440085 - 2¹ = 25440083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25440083) 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, 231219 + ... + 231328.

It is an arithmetic number, because the mean of its divisors is an integer number (4162932).

Almost surely, 2^25440085 is an apocalyptic number.

It is an amenable number.

25440085 is a deficient number, since it is larger than the sum of its proper divisors (7863371).

25440085 is a wasteful number, since it uses less digits than its factorization.

25440085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462563.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 25440085 is about 5043.8165113335. The cubic root of 25440085 is about 294.1075585598.

The spelling of 25440085 in words is "twenty-five million, four hundred forty thousand, eighty-five".