25420356 has 72 divisors (see below), whose sum is σ = 71624280. Its totient is φ = 7547904.

The previous prime is 25420333. The next prime is 25420361. The reversal of 25420356 is 65302452.

It can be written as a sum of positive squares in 4 ways, for example, as 260100 + 25160256 = 510^2 + 5016^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12636 + ... + 14508.

Almost surely, 2^25420356 is an apocalyptic number.

25420356 is a gapful number since it is divisible by the number (26) 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 25420356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35812140).

25420356 is an abundant number, since it is smaller than the sum of its proper divisors (46203924).

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

25420356 is a wasteful number, since it uses less digits than its factorization.

25420356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925 (or 1920 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 25420356 is about 5041.8603709345. The cubic root of 25420356 is about 294.0315112691.

The spelling of 25420356 in words is "twenty-five million, four hundred twenty thousand, three hundred fifty-six".