25445900 has 36 divisors (see below), whose sum is σ = 55933920. Its totient is φ = 10046400.

The previous prime is 25445897. The next prime is 25445909. The reversal of 25445900 is 954452.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25445909) 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, 6290 + ... + 9510.

It is an arithmetic number, because the mean of its divisors is an integer number (1553720).

Almost surely, 2^25445900 is an apocalyptic number.

25445900 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 25445900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27966960).

25445900 is an abundant number, since it is smaller than the sum of its proper divisors (30488020).

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

25445900 is a wasteful number, since it uses less digits than its factorization.

25445900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3314 (or 3307 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 25445900 is about 5044.3929268050. The cubic root of 25445900 is about 294.1299655233.

The spelling of 25445900 in words is "twenty-five million, four hundred forty-five thousand, nine hundred".