25643090 has 32 divisors (see below), whose sum is σ = 50823936. Its totient is φ = 9237760.

The previous prime is 25643083. The next prime is 25643113. The reversal of 25643090 is 9034652.

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, 11399 + ... + 13461.

It is an arithmetic number, because the mean of its divisors is an integer number (1588248).

Almost surely, 2^25643090 is an apocalyptic number.

25643090 is a deficient number, since it is larger than the sum of its proper divisors (25180846).

25643090 is a wasteful number, since it uses less digits than its factorization.

25643090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 25643090 is about 5063.9006704318. The cubic root of 25643090 is about 294.8877864890.

The spelling of 25643090 in words is "twenty-five million, six hundred forty-three thousand, ninety".