25129830 has 64 divisors (see below), whose sum is σ = 66272256. Its totient is φ = 6048000.

The previous prime is 25129829. The next prime is 25129849. The reversal of 25129830 is 3892152.

It is a happy number.

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 (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89290 + ... + 89570.

It is an arithmetic number, because the mean of its divisors is an integer number (1035504).

Almost surely, 2^25129830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25129830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33136128).

25129830 is an abundant number, since it is smaller than the sum of its proper divisors (41142426).

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

25129830 is a wasteful number, since it uses less digits than its factorization.

25129830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 25129830 is about 5012.9661877974. The cubic root of 25129830 is about 292.9070670957.

The spelling of 25129830 in words is "twenty-five million, one hundred twenty-nine thousand, eight hundred thirty".