25799550 has 48 divisors (see below), whose sum is σ = 73126272. Its totient is φ = 5896800.

The previous prime is 25799513. The next prime is 25799551. The reversal of 25799550 is 5599752.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25799551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11236 + ... + 13335.

It is an arithmetic number, because the mean of its divisors is an integer number (1523464).

Almost surely, 2^25799550 is an apocalyptic number.

25799550 is an abundant number, since it is smaller than the sum of its proper divisors (47326722).

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

25799550 is a wasteful number, since it uses less digits than its factorization.

25799550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24593 (or 24588 counting only the distinct ones).

The product of its (nonzero) digits is 141750, while the sum is 42.

The square root of 25799550 is about 5079.3257426552. The cubic root of 25799550 is about 295.4863184048.

The spelling of 25799550 in words is "twenty-five million, seven hundred ninety-nine thousand, five hundred fifty".