25434320 has 60 divisors (see below), whose sum is σ = 61920516. Its totient is φ = 9715200.

The previous prime is 25434319. The next prime is 25434323. The reversal of 25434320 is 2343452.

It can be written as a sum of positive squares in 2 ways, for example, as 15649936 + 9784384 = 3956^2 + 3128^2 .

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25434323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42020 + ... + 42620.

Almost surely, 2^25434320 is an apocalyptic number.

25434320 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 25434320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30960258).

25434320 is an abundant number, since it is smaller than the sum of its proper divisors (36486196).

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

25434320 is a wasteful number, since it uses less digits than its factorization.

25434320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 25434320 is about 5043.2449871090. The cubic root of 25434320 is about 294.0853408908.

Adding to 25434320 its reverse (2343452), we get a palindrome (27777772).

The spelling of 25434320 in words is "twenty-five million, four hundred thirty-four thousand, three hundred twenty".