25716440 has 32 divisors (see below), whose sum is σ = 58661280. Its totient is φ = 10144512.

The previous prime is 25716437. The next prime is 25716463. The reversal of 25716440 is 4461752.

25716440 = 527² + 528² + ... + 606².

It is a super-2 number, since 2×25716440² = 1322670572547200, which contains 22 as substring.

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, 1484 + ... + 7323.

It is an arithmetic number, because the mean of its divisors is an integer number (1833165).

Almost surely, 2^25716440 is an apocalyptic number.

25716440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25716440 is an abundant number, since it is smaller than the sum of its proper divisors (32944840).

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

25716440 is a wasteful number, since it uses less digits than its factorization.

25716440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8891 (or 8887 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 25716440 is about 5071.1379393584. The cubic root of 25716440 is about 295.1686864404.

The spelling of 25716440 in words is "twenty-five million, seven hundred sixteen thousand, four hundred forty".