25445740 has 12 divisors (see below), whose sum is σ = 53436096. Its totient is φ = 10178288.

The previous prime is 25445737. The next prime is 25445741. The reversal of 25445740 is 4754452.

It is not an unprimeable number, because it can be changed into a prime (25445741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636124 + ... + 636163.

It is an arithmetic number, because the mean of its divisors is an integer number (4453008).

Almost surely, 2^25445740 is an apocalyptic number.

25445740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25445740 is an abundant number, since it is smaller than the sum of its proper divisors (27990356).

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

25445740 is a wasteful number, since it uses less digits than its factorization.

25445740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272296 (or 1272294 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 31.

The square root of 25445740 is about 5044.3770675872. The cubic root of 25445740 is about 294.1293490403.

The spelling of 25445740 in words is "twenty-five million, four hundred forty-five thousand, seven hundred forty".