25008220 has 24 divisors (see below), whose sum is σ = 52701264. Its totient is φ = 9968256.

The previous prime is 25008187. The next prime is 25008223. The reversal of 25008220 is 2280052.

It is a super-2 number, since 2×25008220² = 1250822135136800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25008223) 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, 4104 + ... + 8176.

It is an arithmetic number, because the mean of its divisors is an integer number (2195886).

Almost surely, 2^25008220 is an apocalyptic number.

25008220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25008220 is an abundant number, since it is smaller than the sum of its proper divisors (27693044).

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

25008220 is a wasteful number, since it uses less digits than its factorization.

25008220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4389 (or 4387 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 25008220 is about 5000.8219324427. The cubic root of 25008220 is about 292.4338175440.

Adding to 25008220 its reverse (2280052), we get a palindrome (27288272).

The spelling of 25008220 in words is "twenty-five million, eight thousand, two hundred twenty".