25749940 has 24 divisors (see below), whose sum is σ = 56921760. Its totient is φ = 9757728.

The previous prime is 25749923. The next prime is 25749961. The reversal of 25749940 is 4994752.

It is a junction number, because it is equal to n+sod(n) for n = 25749893 and 25749902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33502 + ... + 34261.

It is an arithmetic number, because the mean of its divisors is an integer number (2371740).

Almost surely, 2^25749940 is an apocalyptic number.

25749940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25749940 is an abundant number, since it is smaller than the sum of its proper divisors (31171820).

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

25749940 is a wasteful number, since it uses less digits than its factorization.

25749940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67791 (or 67789 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 25749940 is about 5074.4398705670. The cubic root of 25749940 is about 295.2967998241.

The spelling of 25749940 in words is "twenty-five million, seven hundred forty-nine thousand, nine hundred forty".