25725810 has 96 divisors (see below), whose sum is σ = 71628480. Its totient is φ = 5892480.

The previous prime is 25725809. The next prime is 25725823. The reversal of 25725810 is 1852752.

It is a super-2 number, since 2×25725810² = 1323634600312200, which contains 22 as substring.

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

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 47 ways as a sum of consecutive naturals, for example, 68784 + ... + 69156.

It is an arithmetic number, because the mean of its divisors is an integer number (746130).

Almost surely, 2^25725810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25725810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35814240).

25725810 is an abundant number, since it is smaller than the sum of its proper divisors (45902670).

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

25725810 is a wasteful number, since it uses less digits than its factorization.

25725810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 25725810 is about 5072.0617109810. The cubic root of 25725810 is about 295.2045311472.

The spelling of 25725810 in words is "twenty-five million, seven hundred twenty-five thousand, eight hundred ten".