25435220 has 24 divisors (see below), whose sum is σ = 53538408. Its totient is φ = 10150400.

The previous prime is 25435183. The next prime is 25435229. The reversal of 25435220 is 2253452.

It can be written as a sum of positive squares in 4 ways, for example, as 13456 + 25421764 = 116^2 + 5042^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25435229) 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, 9200 + ... + 11640.

It is an arithmetic number, because the mean of its divisors is an integer number (2230767).

Almost surely, 2^25435220 is an apocalyptic number.

25435220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25435220 is an abundant number, since it is smaller than the sum of its proper divisors (28103188).

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

25435220 is a wasteful number, since it uses less digits than its factorization.

25435220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971 (or 2969 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 25435220 is about 5043.3342145846. The cubic root of 25435220 is about 294.0888096119.

Adding to 25435220 its reverse (2253452), we get a palindrome (27688672).

The spelling of 25435220 in words is "twenty-five million, four hundred thirty-five thousand, two hundred twenty".