25047820 has 72 divisors (see below), whose sum is σ = 62339760. Its totient is φ = 8426880.

The previous prime is 25047811. The next prime is 25047859. The reversal of 25047820 is 2874052.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 59571 + ... + 59989.

It is an arithmetic number, because the mean of its divisors is an integer number (865830).

Almost surely, 2^25047820 is an apocalyptic number.

25047820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25047820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31169880).

25047820 is an abundant number, since it is smaller than the sum of its proper divisors (37291940).

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

25047820 is a wasteful number, since it uses less digits than its factorization.

25047820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 25047820 is about 5004.7797154320. The cubic root of 25047820 is about 292.5880904472.

The spelling of 25047820 in words is "twenty-five million, forty-seven thousand, eight hundred twenty".