25726220 has 24 divisors (see below), whose sum is σ = 58181424. Its totient is φ = 9498816.

The previous prime is 25726189. The next prime is 25726223. The reversal of 25726220 is 2262752.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 25726220.

It is not an unprimeable number, because it can be changed into a prime (25726223) 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, 49214 + ... + 49733.

It is an arithmetic number, because the mean of its divisors is an integer number (2424226).

Almost surely, 2^25726220 is an apocalyptic number.

25726220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25726220 is an abundant number, since it is smaller than the sum of its proper divisors (32455204).

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

25726220 is a wasteful number, since it uses less digits than its factorization.

25726220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98969 (or 98967 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 25726220 is about 5072.1021283093. The cubic root of 25726220 is about 295.2060993934.

Adding to 25726220 its reverse (2262752), we get a palindrome (27988972).

The spelling of 25726220 in words is "twenty-five million, seven hundred twenty-six thousand, two hundred twenty".