25479890 has 8 divisors (see below), whose sum is σ = 45863820. Its totient is φ = 10191952.

The previous prime is 25479877. The next prime is 25479907. The reversal of 25479890 is 9897452.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22819729 + 2660161 = 4777^2 + 1631^2 .

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

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1273985 + ... + 1274004.

Almost surely, 2^25479890 is an apocalyptic number.

25479890 is a deficient number, since it is larger than the sum of its proper divisors (20383930).

25479890 is a wasteful number, since it uses less digits than its factorization.

25479890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547996.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 25479890 is about 5047.7608897411. The cubic root of 25479890 is about 294.2608710833.

The spelling of 25479890 in words is "twenty-five million, four hundred seventy-nine thousand, eight hundred ninety".