25899930 has 96 divisors (see below), whose sum is σ = 78624000. Its totient is φ = 5912928.

The previous prime is 25899919. The next prime is 25899931. The reversal of 25899930 is 3999852.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (25899931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30451 + ... + 31289.

It is an arithmetic number, because the mean of its divisors is an integer number (819000).

Almost surely, 2^25899930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25899930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39312000).

25899930 is an abundant number, since it is smaller than the sum of its proper divisors (52724070).

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

25899930 is a wasteful number, since it uses less digits than its factorization.

25899930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 25899930 is about 5089.1973826921. The cubic root of 25899930 is about 295.8690451279.

The spelling of 25899930 in words is "twenty-five million, eight hundred ninety-nine thousand, nine hundred thirty".