25788040 has 16 divisors (see below), whose sum is σ = 58023180. Its totient is φ = 10315200.

The previous prime is 25788029. The next prime is 25788041. The reversal of 25788040 is 4088752.

It can be written as a sum of positive squares in 2 ways, for example, as 23483716 + 2304324 = 4846^2 + 1518^2 .

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 25787987 and 25788005.

It is not an unprimeable number, because it can be changed into a prime (25788041) 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, 322311 + ... + 322390.

Almost surely, 2^25788040 is an apocalyptic number.

25788040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25788040 is an abundant number, since it is smaller than the sum of its proper divisors (32235140).

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

25788040 is a wasteful number, since it uses less digits than its factorization.

25788040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644712 (or 644708 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 25788040 is about 5078.1925918579. The cubic root of 25788040 is about 295.4423699196.

The spelling of 25788040 in words is "twenty-five million, seven hundred eighty-eight thousand, forty".