25629438 has 32 divisors (see below), whose sum is σ = 55054080. Its totient is φ = 7925120.

The previous prime is 25629407. The next prime is 25629473. The reversal of 25629438 is 83492652.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25629396 and 25629405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5473 + ... + 9011.

It is an arithmetic number, because the mean of its divisors is an integer number (1720440).

Almost surely, 2^25629438 is an apocalyptic number.

25629438 is an abundant number, since it is smaller than the sum of its proper divisors (29424642).

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

25629438 is a wasteful number, since it uses less digits than its factorization.

25629438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632.

The product of its digits is 103680, while the sum is 39.

The square root of 25629438 is about 5062.5525182461. The cubic root of 25629438 is about 294.8354459078.

The spelling of 25629438 in words is "twenty-five million, six hundred twenty-nine thousand, four hundred thirty-eight".