25490890 has 8 divisors (see below), whose sum is σ = 45883620. Its totient is φ = 10196352.

The previous prime is 25490867. The next prime is 25490893. The reversal of 25490890 is 9809452.

It can be written as a sum of positive squares in 2 ways, for example, as 24472809 + 1018081 = 4947^2 + 1009^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (25490893) 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 3 ways as a sum of consecutive naturals, for example, 1274535 + ... + 1274554.

Almost surely, 2^25490890 is an apocalyptic number.

25490890 is a deficient number, since it is larger than the sum of its proper divisors (20392730).

25490890 is a wasteful number, since it uses less digits than its factorization.

25490890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549096.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 25490890 is about 5048.8503641918. The cubic root of 25490890 is about 294.3032104065.

The spelling of 25490890 in words is "twenty-five million, four hundred ninety thousand, eight hundred ninety".