25716540 has 48 divisors (see below), whose sum is σ = 72662688. Its totient is φ = 6795264.

The previous prime is 25716539. The next prime is 25716541. The reversal of 25716540 is 4561752.

It is an interprime number because it is at equal distance from previous prime (25716539) and next prime (25716541).

It is a super-2 number, since 2×25716540² = 1322680859143200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25716498 and 25716507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25716541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4884 + ... + 8676.

It is an arithmetic number, because the mean of its divisors is an integer number (1513806).

Almost surely, 2^25716540 is an apocalyptic number.

25716540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25716540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36331344).

25716540 is an abundant number, since it is smaller than the sum of its proper divisors (46946148).

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

25716540 is a wasteful number, since it uses less digits than its factorization.

25716540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918 (or 3916 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 25716540 is about 5071.1477990688. The cubic root of 25716540 is about 295.1690690339.

The spelling of 25716540 in words is "twenty-five million, seven hundred sixteen thousand, five hundred forty".