25690390 has 16 divisors (see below), whose sum is σ = 50446800. Its totient is φ = 9341920.

The previous prime is 25690387. The next prime is 25690403. The reversal of 25690390 is 9309652.

It is a happy number.

It is a super-2 number, since 2×25690390² = 1319992276704200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 116665 + ... + 116884.

It is an arithmetic number, because the mean of its divisors is an integer number (3152925).

Almost surely, 2^25690390 is an apocalyptic number.

25690390 is a deficient number, since it is larger than the sum of its proper divisors (24756410).

25690390 is a wasteful number, since it uses less digits than its factorization.

25690390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233567.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 25690390 is about 5068.5688315342. The cubic root of 25690390 is about 295.0689870258.

The spelling of 25690390 in words is "twenty-five million, six hundred ninety thousand, three hundred ninety".