25700540 has 48 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 9525312.

The previous prime is 25700531. The next prime is 25700551. The reversal of 25700540 is 4500752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17141 + ... + 18579.

It is an arithmetic number, because the mean of its divisors is an integer number (1209600).

Almost surely, 2^25700540 is an apocalyptic number.

25700540 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 25700540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29030400).

25700540 is an abundant number, since it is smaller than the sum of its proper divisors (32360260).

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

25700540 is a wasteful number, since it uses less digits than its factorization.

25700540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 1512 counting only the distinct ones).

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

The square root of 25700540 is about 5069.5700014893. The cubic root of 25700540 is about 295.1078414494.

The spelling of 25700540 in words is "twenty-five million, seven hundred thousand, five hundred forty".