25870500 has 72 divisors (see below), whose sum is σ = 81627000. Its totient is φ = 6897600.

The previous prime is 25870489. The next prime is 25870529. The reversal of 25870500 is 507852.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6843456 + 19027044 = 2616^2 + 4362^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1626 + ... + 7374.

Almost surely, 2^25870500 is an apocalyptic number.

25870500 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 25870500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40813500).

25870500 is an abundant number, since it is smaller than the sum of its proper divisors (55756500).

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

25870500 is a wasteful number, since it uses less digits than its factorization.

25870500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5774 (or 5759 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 25870500 is about 5086.3051422423. The cubic root of 25870500 is about 295.7569376672.

The spelling of 25870500 in words is "twenty-five million, eight hundred seventy thousand, five hundred".