25922778 has 32 divisors (see below), whose sum is σ = 59512320. Its totient is φ = 7374000.

The previous prime is 25922749. The next prime is 25922779. The reversal of 25922778 is 87722952.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25922779) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9313 + ... + 11771.

It is an arithmetic number, because the mean of its divisors is an integer number (1859760).

Almost surely, 2^25922778 is an apocalyptic number.

25922778 is an abundant number, since it is smaller than the sum of its proper divisors (33589542).

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

25922778 is a wasteful number, since it uses less digits than its factorization.

25922778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722.

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

The square root of 25922778 is about 5091.4416425999. The cubic root of 25922778 is about 295.9560212845.

The spelling of 25922778 in words is "twenty-five million, nine hundred twenty-two thousand, seven hundred seventy-eight".