25420008 has 32 divisors (see below), whose sum is σ = 65743200. Its totient is φ = 8180928.

The previous prime is 25420007. The next prime is 25420033. The reversal of 25420008 is 80002452.

Added to its reverse (80002452) it gives a triangular number (105422460 = T₁₄₅₂₀).

It is not an unprimeable number, because it can be changed into a prime (25420007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17566 + ... + 18957.

It is an arithmetic number, because the mean of its divisors is an integer number (2054475).

Almost surely, 2^25420008 is an apocalyptic number.

It is an amenable number.

25420008 is an abundant number, since it is smaller than the sum of its proper divisors (40323192).

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

25420008 is a wasteful number, since it uses less digits than its factorization.

25420008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36561 (or 36557 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 25420008 is about 5041.8258597457. The cubic root of 25420008 is about 294.0301695172.

Adding to 25420008 its reverse (80002452), we get a triangular number (105422460 = T₁₄₅₂₀).

The spelling of 25420008 in words is "twenty-five million, four hundred twenty thousand, eight".