25920290 has 32 divisors (see below), whose sum is σ = 51672384. Its totient is φ = 9282240.

The previous prime is 25920289. The next prime is 25920341. The reversal of 25920290 is 9202952.

It is a super-2 number, since 2×25920290² = 1343722867368200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5612 + ... + 9128.

It is an arithmetic number, because the mean of its divisors is an integer number (1614762).

Almost surely, 2^25920290 is an apocalyptic number.

25920290 is a deficient number, since it is larger than the sum of its proper divisors (25752094).

25920290 is a wasteful number, since it uses less digits than its factorization.

25920290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 25920290 is about 5091.1973051533. The cubic root of 25920290 is about 295.9465526216.

The spelling of 25920290 in words is "twenty-five million, nine hundred twenty thousand, two hundred ninety".