25290432 has 126 divisors (see below), whose sum is σ = 76692252. Its totient is φ = 7966464.

The previous prime is 25290431. The next prime is 25290437. The reversal of 25290432 is 23409252.

It is a junction number, because it is equal to n+sod(n) for n = 25290396 and 25290405.

It is not an unprimeable number, because it can be changed into a prime (25290431) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 304663 + ... + 304745.

Almost surely, 2^25290432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25290432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38346126).

25290432 is an abundant number, since it is smaller than the sum of its proper divisors (51401820).

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

25290432 is a wasteful number, since it uses less digits than its factorization.

25290432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 25290432 is about 5028.9593356877. The cubic root of 25290432 is about 293.5297215639.

Adding to 25290432 its reverse (23409252), we get a palindrome (48699684).

The spelling of 25290432 in words is "twenty-five million, two hundred ninety thousand, four hundred thirty-two".