25070220 has 144 divisors (see below), whose sum is σ = 88216128. Its totient is φ = 5644800.

The previous prime is 25070209. The next prime is 25070237. The reversal of 25070220 is 2207052.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 25070193 and 25070202.

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 47 ways as a sum of consecutive naturals, for example, 127162 + ... + 127358.

It is an arithmetic number, because the mean of its divisors is an integer number (612612).

Almost surely, 2^25070220 is an apocalyptic number.

25070220 is a gapful number since it is divisible by the number (20) 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 25070220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44108064).

25070220 is an abundant number, since it is smaller than the sum of its proper divisors (63145908).

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

25070220 is a wasteful number, since it uses less digits than its factorization.

25070220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 25070220 is about 5007.0170760644. The cubic root of 25070220 is about 292.6752839366.

Adding to 25070220 its reverse (2207052), we get a palindrome (27277272).

The spelling of 25070220 in words is "twenty-five million, seventy thousand, two hundred twenty".