25904778 has 16 divisors (see below), whose sum is σ = 53481216. Its totient is φ = 8356320.

The previous prime is 25904777. The next prime is 25904779. The reversal of 25904778 is 87740952.

It is an interprime number because it is at equal distance from previous prime (25904777) and next prime (25904779).

It is a super-3 number, since 3×25904778³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25904777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69451 + ... + 69822.

It is an arithmetic number, because the mean of its divisors is an integer number (3342576).

Almost surely, 2^25904778 is an apocalyptic number.

25904778 is an abundant number, since it is smaller than the sum of its proper divisors (27576438).

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

25904778 is a wasteful number, since it uses less digits than its factorization.

25904778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139309.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 25904778 is about 5089.6736634091. The cubic root of 25904778 is about 295.8875044267.

The spelling of 25904778 in words is "twenty-five million, nine hundred four thousand, seven hundred seventy-eight".