25384540 has 24 divisors (see below), whose sum is σ = 54184032. Its totient is φ = 9986880.

The previous prime is 25384537. The next prime is 25384543. The reversal of 25384540 is 4548352.

It is an interprime number because it is at equal distance from previous prime (25384537) and next prime (25384543).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25384543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9184 + ... + 11623.

It is an arithmetic number, because the mean of its divisors is an integer number (2257668).

Almost surely, 2^25384540 is an apocalyptic number.

25384540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25384540 is an abundant number, since it is smaller than the sum of its proper divisors (28799492).

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

25384540 is a wasteful number, since it uses less digits than its factorization.

25384540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20877 (or 20875 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 25384540 is about 5038.3072554182. The cubic root of 25384540 is about 293.8933545051.

The spelling of 25384540 in words is "twenty-five million, three hundred eighty-four thousand, five hundred forty".