25750040 has 16 divisors (see below), whose sum is σ = 57937680. Its totient is φ = 10300000.

The previous prime is 25750037. The next prime is 25750069. The reversal of 25750040 is 4005752.

It is a junction number, because it is equal to n+sod(n) for n = 25749988 and 25750015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321836 + ... + 321915.

It is an arithmetic number, because the mean of its divisors is an integer number (3621105).

Almost surely, 2^25750040 is an apocalyptic number.

25750040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25750040 is an abundant number, since it is smaller than the sum of its proper divisors (32187640).

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

25750040 is a wasteful number, since it uses less digits than its factorization.

25750040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643762 (or 643758 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 25750040 is about 5074.4497238617. The cubic root of 25750040 is about 295.2971820858.

Adding to 25750040 its reverse (4005752), we get a palindrome (29755792).

The spelling of 25750040 in words is "twenty-five million, seven hundred fifty thousand, forty".