25673634 has 48 divisors (see below), whose sum is σ = 65302848. Its totient is φ = 7135776.

The previous prime is 25673633. The next prime is 25673651. The reversal of 25673634 is 43637652.

It is not an unprimeable number, because it can be changed into a prime (25673633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1909 + ... + 7415.

It is an arithmetic number, because the mean of its divisors is an integer number (1360476).

Almost surely, 2^25673634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25673634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32651424).

25673634 is an abundant number, since it is smaller than the sum of its proper divisors (39629214).

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

25673634 is a wasteful number, since it uses less digits than its factorization.

25673634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5559 (or 5556 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 25673634 is about 5066.9156298482. The cubic root of 25673634 is about 295.0048222902.

The spelling of 25673634 in words is "twenty-five million, six hundred seventy-three thousand, six hundred thirty-four".