25651428 has 48 divisors (see below), whose sum is σ = 67556160. Its totient is φ = 7504000.

The previous prime is 25651421. The next prime is 25651441. The reversal of 25651428 is 82415652.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (25651421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478 + ... + 7178.

It is an arithmetic number, because the mean of its divisors is an integer number (1407420).

Almost surely, 2^25651428 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 25651428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33778080).

25651428 is an abundant number, since it is smaller than the sum of its proper divisors (41904732).

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

25651428 is a wasteful number, since it uses less digits than its factorization.

25651428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6748 (or 6746 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 25651428 is about 5064.7238819110. The cubic root of 25651428 is about 294.9197445189.

It can be divided in two parts, 2565 and 1428, that added together give a palindrome (3993).

The spelling of 25651428 in words is "twenty-five million, six hundred fifty-one thousand, four hundred twenty-eight".