25939990 has 16 divisors (see below), whose sum is σ = 47256048. Its totient is φ = 10250656.

The previous prime is 25939987. The next prime is 25939993. The reversal of 25939990 is 9993952.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25939987) and next prime (25939993).

It is a self number, because there is not a number n which added to its sum of digits gives 25939990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25939993) 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, 14797 + ... + 16456.

It is an arithmetic number, because the mean of its divisors is an integer number (2953503).

Almost surely, 2^25939990 is an apocalyptic number.

25939990 is a deficient number, since it is larger than the sum of its proper divisors (21316058).

25939990 is a wasteful number, since it uses less digits than its factorization.

25939990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31343.

The product of its (nonzero) digits is 196830, while the sum is 46.

The square root of 25939990 is about 5093.1316495846. The cubic root of 25939990 is about 296.0215089678.

The spelling of 25939990 in words is "twenty-five million, nine hundred thirty-nine thousand, nine hundred ninety".