25403238 has 48 divisors (see below), whose sum is σ = 64615200. Its totient is φ = 7060608.

The previous prime is 25403237. The next prime is 25403249. The reversal of 25403238 is 83230452.

25403238 is a `hidden beast` number, since 25 + 403 + 238 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25403237) 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, 1938 + ... + 7386.

It is an arithmetic number, because the mean of its divisors is an integer number (1346150).

Almost surely, 2^25403238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25403238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32307600).

25403238 is an abundant number, since it is smaller than the sum of its proper divisors (39211962).

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

25403238 is a wasteful number, since it uses less digits than its factorization.

25403238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5501 (or 5498 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 25403238 is about 5040.1624973804. The cubic root of 25403238 is about 293.9654964368.

It can be divided in two parts, 2540 and 3238, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 25403238 in words is "twenty-five million, four hundred three thousand, two hundred thirty-eight".