25578020 has 24 divisors (see below), whose sum is σ = 57846264. Its totient is φ = 9444096.

The previous prime is 25577999. The next prime is 25578031. The reversal of 25578020 is 2087552.

It can be written as a sum of positive squares in 4 ways, for example, as 14884 + 25563136 = 122^2 + 5056^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48929 + ... + 49448.

It is an arithmetic number, because the mean of its divisors is an integer number (2410261).

Almost surely, 2^25578020 is an apocalyptic number.

25578020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25578020 is an abundant number, since it is smaller than the sum of its proper divisors (32268244).

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

25578020 is a wasteful number, since it uses less digits than its factorization.

25578020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98399 (or 98397 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 25578020 is about 5057.4717003657. The cubic root of 25578020 is about 294.6381467680.

The spelling of 25578020 in words is "twenty-five million, five hundred seventy-eight thousand, twenty".