8440425 has 72 divisors (see below), whose sum is σ = 18105984. Its totient is φ = 3674880.

The previous prime is 8440423. The next prime is 8440429. The reversal of 8440425 is 5240448.

8440425 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8440425 - 2¹ = 8440423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8440423) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 36109 + ... + 36341.

It is an arithmetic number, because the mean of its divisors is an integer number (251472).

Almost surely, 2^8440425 is an apocalyptic number.

It is an amenable number.

8440425 is an abundant number, since it is smaller than the sum of its proper divisors (9665559).

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

8440425 is a wasteful number, since it uses less digits than its factorization.

8440425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 8440425 is about 2905.2409538625. The cubic root of 8440425 is about 203.6048434794.

The spelling of 8440425 in words is "eight million, four hundred forty thousand, four hundred twenty-five".