25280280030 has 32 divisors (see below), whose sum is σ = 63310616064. Its totient is φ = 6448303136.

The previous prime is 25280280001. The next prime is 25280280037. The reversal of 25280280030 is 3008208252.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25280280030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25280280037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18318354 + ... + 18319733.

It is an arithmetic number, because the mean of its divisors is an integer number (1978456752).

Almost surely, 2^25280280030 is an apocalyptic number.

25280280030 is an abundant number, since it is smaller than the sum of its proper divisors (38030336034).

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

25280280030 is a wasteful number, since it uses less digits than its factorization.

25280280030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36638120.

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 25280280030 its reverse (3008208252), we get a palindrome (28288488282).

The spelling of 25280280030 in words is "twenty-five billion, two hundred eighty million, two hundred eighty thousand, thirty".