25217628 has 24 divisors (see below), whose sum is σ = 59308032. Its totient is φ = 8339184.

The previous prime is 25217627. The next prime is 25217629. The reversal of 25217628 is 82671252.

It is an interprime number because it is at equal distance from previous prime (25217627) and next prime (25217629).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25217623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6750 + ... + 9797.

It is an arithmetic number, because the mean of its divisors is an integer number (2471168).

Almost surely, 2^25217628 is an apocalyptic number.

It is an amenable number.

25217628 is an abundant number, since it is smaller than the sum of its proper divisors (34090404).

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

25217628 is a wasteful number, since it uses less digits than its factorization.

25217628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16681 (or 16679 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 25217628 is about 5021.7156430845. The cubic root of 25217628 is about 293.2477878416.

The spelling of 25217628 in words is "twenty-five million, two hundred seventeen thousand, six hundred twenty-eight".