25428447220 has 24 divisors (see below), whose sum is σ = 58254261408. Its totient is φ = 9246708000.

The previous prime is 25428447101. The next prime is 25428447259. The reversal of 25428447220 is 2274482452.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57791706 + ... + 57792145.

It is an arithmetic number, because the mean of its divisors is an integer number (2427260892).

Almost surely, 2^25428447220 is an apocalyptic number.

25428447220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25428447220 is an abundant number, since it is smaller than the sum of its proper divisors (32825814188).

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

25428447220 is a wasteful number, since it uses less digits than its factorization.

25428447220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115583871 (or 115583869 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 40.

The spelling of 25428447220 in words is "twenty-five billion, four hundred twenty-eight million, four hundred forty-seven thousand, two hundred twenty".