25438478 has 8 divisors (see below), whose sum is σ = 41092968. Its totient is φ = 11740824.

The previous prime is 25438471. The next prime is 25438487. The reversal of 25438478 is 87483452.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25438471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489176 + ... + 489227.

It is an arithmetic number, because the mean of its divisors is an integer number (5136621).

Almost surely, 2^25438478 is an apocalyptic number.

25438478 is a deficient number, since it is larger than the sum of its proper divisors (15654490).

25438478 is a wasteful number, since it uses less digits than its factorization.

25438478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978418.

The product of its digits is 215040, while the sum is 41.

The square root of 25438478 is about 5043.6572048465. The cubic root of 25438478 is about 294.1013656980.

The spelling of 25438478 in words is "twenty-five million, four hundred thirty-eight thousand, four hundred seventy-eight".