25440906 has 8 divisors (see below), whose sum is σ = 50881824. Its totient is φ = 8480300.

The previous prime is 25440889. The next prime is 25440913. The reversal of 25440906 is 60904452.

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

25440906 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2120070 + ... + 2120081.

It is an arithmetic number, because the mean of its divisors is an integer number (6360228).

Almost surely, 2^25440906 is an apocalyptic number.

25440906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25440906 is a wasteful number, since it uses less digits than its factorization.

25440906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240156.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 25440906 is about 5043.8978974599. The cubic root of 25440906 is about 294.1107223295.

The spelling of 25440906 in words is "twenty-five million, four hundred forty thousand, nine hundred six".