25436420 has 48 divisors (see below), whose sum is σ = 57335040. Its totient is φ = 9444864.

The previous prime is 25436419. The next prime is 25436479. The reversal of 25436420 is 2463452.

It is a super-2 number, since 2×25436420² = 1294022924832800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25436420.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26387 + ... + 27333.

It is an arithmetic number, because the mean of its divisors is an integer number (1194480).

Almost surely, 2^25436420 is an apocalyptic number.

25436420 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 25436420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28667520).

25436420 is an abundant number, since it is smaller than the sum of its proper divisors (31898620).

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

25436420 is a wasteful number, since it uses less digits than its factorization.

25436420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 25436420 is about 5043.4531820966. The cubic root of 25436420 is about 294.0934344460.

Adding to 25436420 its reverse (2463452), we get a palindrome (27899872).

The spelling of 25436420 in words is "twenty-five million, four hundred thirty-six thousand, four hundred twenty".