25078820 has 24 divisors (see below), whose sum is σ = 56717304. Its totient is φ = 9259776.

The previous prime is 25078819. The next prime is 25078849. The reversal of 25078820 is 2887052.

It can be written as a sum of positive squares in 4 ways, for example, as 1478656 + 23600164 = 1216^2 + 4858^2 .

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 7 ways as a sum of consecutive naturals, for example, 47969 + ... + 48488.

It is an arithmetic number, because the mean of its divisors is an integer number (2363221).

Almost surely, 2^25078820 is an apocalyptic number.

25078820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25078820 is an abundant number, since it is smaller than the sum of its proper divisors (31638484).

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

25078820 is a wasteful number, since it uses less digits than its factorization.

25078820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96479 (or 96477 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 25078820 is about 5007.8757971819. The cubic root of 25078820 is about 292.7087462103.

The spelling of 25078820 in words is "twenty-five million, seventy-eight thousand, eight hundred twenty".