25071228 has 96 divisors (see below), whose sum is σ = 80030720. Its totient is φ = 6609600.

The previous prime is 25071223. The next prime is 25071251. The reversal of 25071228 is 82217052.

It is a super-3 number, since 3×25071228³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25071223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8553 + ... + 11103.

Almost surely, 2^25071228 is an apocalyptic number.

25071228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25071228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40015360).

25071228 is an abundant number, since it is smaller than the sum of its proper divisors (54959492).

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

25071228 is a wasteful number, since it uses less digits than its factorization.

25071228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584 (or 2576 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 25071228 is about 5007.1177337866. The cubic root of 25071228 is about 292.6792064222.

The spelling of 25071228 in words is "twenty-five million, seventy-one thousand, two hundred twenty-eight".