25243400 has 192 divisors, whose sum is σ = 77078400. Its totient is φ = 7464960.

The previous prime is 25243391. The next prime is 25243403. The reversal of 25243400 is 434252.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (25243403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 345764 + ... + 345836.

It is an arithmetic number, because the mean of its divisors is an integer number (401450).

Almost surely, 2^25243400 is an apocalyptic number.

25243400 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 25243400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38539200).

25243400 is an abundant number, since it is smaller than the sum of its proper divisors (51835000).

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

25243400 is a wasteful number, since it uses less digits than its factorization.

25243400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 25243400 is about 5024.2810430946. The cubic root of 25243400 is about 293.3476519640.

Adding to 25243400 its reverse (434252), we get a palindrome (25677652).

The spelling of 25243400 in words is "twenty-five million, two hundred forty-three thousand, four hundred".