25584540 has 36 divisors (see below), whose sum is σ = 71746584. Its totient is φ = 6812096.

The previous prime is 25584521. The next prime is 25584547. The reversal of 25584540 is 4548552.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25584547) 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, 38854 + ... + 39506.

Almost surely, 2^25584540 is an apocalyptic number.

25584540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25584540 is an abundant number, since it is smaller than the sum of its proper divisors (46162044).

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

25584540 is an equidigital number, since it uses as much as digits as its factorization.

25584540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

The square root of 25584540 is about 5058.1162501469. The cubic root of 25584540 is about 294.6631796871.

The spelling of 25584540 in words is "twenty-five million, five hundred eighty-four thousand, five hundred forty".