25478634 has 16 divisors (see below), whose sum is σ = 51675840. Its totient is φ = 8373120.

The previous prime is 25478633. The next prime is 25478647. The reversal of 25478634 is 43687452.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25478592 and 25478601.

It is not an unprimeable number, because it can be changed into a prime (25478633) 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, 29479 + ... + 30330.

It is an arithmetic number, because the mean of its divisors is an integer number (3229740).

Almost surely, 2^25478634 is an apocalyptic number.

25478634 is an abundant number, since it is smaller than the sum of its proper divisors (26197206).

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

25478634 is a wasteful number, since it uses less digits than its factorization.

25478634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59885.

The product of its digits is 161280, while the sum is 39.

The square root of 25478634 is about 5047.6364766096. The cubic root of 25478634 is about 294.2560359273.

The spelling of 25478634 in words is "twenty-five million, four hundred seventy-eight thousand, six hundred thirty-four".