25400000 has 84 divisors (see below), whose sum is σ = 63495936. Its totient is φ = 10080000.

The previous prime is 25399987. The next prime is 25400003. The reversal of 25400000 is 452.

It is a sliding number, since 25400000 = 400000 + 25000000 and 1/400000 + 1/25000000 = 0.0000025400000.

It is not an unprimeable number, because it can be changed into a prime (25400003) 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, 199937 + ... + 200063.

It is an arithmetic number, because the mean of its divisors is an integer number (755904).

Almost surely, 2^25400000 is an apocalyptic number.

25400000 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 25400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31747968).

25400000 is an abundant number, since it is smaller than the sum of its proper divisors (38095936).

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

25400000 is an frugal number, since it uses more digits than its factorization.

25400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 25400000 is about 5039.8412673417. The cubic root of 25400000 is about 293.9530058936.

Adding to 25400000 its reverse (452), we get a palindrome (25400452).

It can be divided in two parts, 25 and 400000, that multiplied together give a 7-th power (10000000 = 10⁷).

The spelling of 25400000 in words is "twenty-five million, four hundred thousand".