25009878 has 32 divisors (see below), whose sum is σ = 53068032. Its totient is φ = 7840800.

The previous prime is 25009849. The next prime is 25009879. The reversal of 25009878 is 87890052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25009879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6933 + ... + 9903.

It is an arithmetic number, because the mean of its divisors is an integer number (1658376).

Almost surely, 2^25009878 is an apocalyptic number.

25009878 is an abundant number, since it is smaller than the sum of its proper divisors (28058154).

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

25009878 is a wasteful number, since it uses less digits than its factorization.

25009878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 25009878 is about 5000.9877024444. The cubic root of 25009878 is about 292.4402800132.

The spelling of 25009878 in words is "twenty-five million, nine thousand, eight hundred seventy-eight".