25445890 has 16 divisors (see below), whose sum is σ = 45868032. Its totient is φ = 10163824.

The previous prime is 25445887. The next prime is 25445897. The reversal of 25445890 is 9854452.

It is not an unprimeable number, because it can be changed into a prime (25445897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8127 + ... + 10813.

It is an arithmetic number, because the mean of its divisors is an integer number (2866752).

Almost surely, 2^25445890 is an apocalyptic number.

25445890 is a deficient number, since it is larger than the sum of its proper divisors (20422142).

25445890 is a wasteful number, since it uses less digits than its factorization.

25445890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 25445890 is about 5044.3919356053. The cubic root of 25445890 is about 294.1299269932.

It can be divided in two parts, 25445 and 890, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 25445890 in words is "twenty-five million, four hundred forty-five thousand, eight hundred ninety".