25699872 has 48 divisors (see below), whose sum is σ = 73598112. Its totient is φ = 7787520.

The previous prime is 25699823. The next prime is 25699873. The reversal of 25699872 is 27899652.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (25699873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11113 + ... + 13224.

It is an arithmetic number, because the mean of its divisors is an integer number (1533294).

Almost surely, 2^25699872 is an apocalyptic number.

25699872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25699872 is an abundant number, since it is smaller than the sum of its proper divisors (47898240).

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

25699872 is a wasteful number, since it uses less digits than its factorization.

25699872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24361 (or 24353 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 25699872 is about 5069.5041177614. The cubic root of 25699872 is about 295.1052846452.

It can be divided in two parts, 256 and 99872, that added together give a triangular number (100128 = T₄₄₇).

The spelling of 25699872 in words is "twenty-five million, six hundred ninety-nine thousand, eight hundred seventy-two".