25748840 has 64 divisors (see below), whose sum is σ = 62974800. Its totient is φ = 9474816.

The previous prime is 25748813. The next prime is 25748843. The reversal of 25748840 is 4884752.

It can be written as a sum of positive squares in 8 ways, for example, as 3364 + 25745476 = 58^2 + 5074^2 .

It is a super-2 number, since 2×25748840² = 1326005522691200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25748794 and 25748803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25748843) 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 15 ways as a sum of consecutive naturals, for example, 87734 + ... + 88026.

Almost surely, 2^25748840 is an apocalyptic number.

25748840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

25748840 is the 2930-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25748840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31487400).

25748840 is an abundant number, since it is smaller than the sum of its proper divisors (37225960).

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

25748840 is a wasteful number, since it uses less digits than its factorization.

25748840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 25748840 is about 5074.3314830626. The cubic root of 25748840 is about 295.2925948809.

The spelling of 25748840 in words is "twenty-five million, seven hundred forty-eight thousand, eight hundred forty".