25630040 has 32 divisors (see below), whose sum is σ = 58898880. Its totient is φ = 10033152.

The previous prime is 25630039. The next prime is 25630057. The reversal of 25630040 is 4003652.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 25629994 and 25630021.

It is a congruent number.

It is an unprimeable number.

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, 4937 + ... + 8696.

It is an arithmetic number, because the mean of its divisors is an integer number (1840590).

Almost surely, 2^25630040 is an apocalyptic number.

25630040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25630040 is an abundant number, since it is smaller than the sum of its proper divisors (33268840).

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

25630040 is a wasteful number, since it uses less digits than its factorization.

25630040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13691 (or 13687 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 25630040 is about 5062.6119740703. The cubic root of 25630040 is about 294.8377543152.

Adding to 25630040 its reverse (4003652), we get a palindrome (29633692).

The spelling of 25630040 in words is "twenty-five million, six hundred thirty thousand, forty".