25040028 has 48 divisors (see below), whose sum is σ = 63397376. Its totient is φ = 7646400.

The previous prime is 25040017. The next prime is 25040047. The reversal of 25040028 is 82004052.

It is a junction number, because it is equal to n+sod(n) for n = 25039986 and 25040013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23025 + ... + 24087.

Almost surely, 2^25040028 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 25040028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31698688).

25040028 is an abundant number, since it is smaller than the sum of its proper divisors (38357348).

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

25040028 is a wasteful number, since it uses less digits than its factorization.

25040028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 25040028 is about 5004.0011990406. The cubic root of 25040028 is about 292.5577473828.

The spelling of 25040028 in words is "twenty-five million, forty thousand, twenty-eight".