25640098 has 32 divisors (see below), whose sum is σ = 43400448. Its totient is φ = 11260800.

The previous prime is 25640081. The next prime is 25640171. The reversal of 25640098 is 89004652.

It is a happy number.

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, 141568 + ... + 141748.

It is an arithmetic number, because the mean of its divisors is an integer number (1356264).

Almost surely, 2^25640098 is an apocalyptic number.

25640098 is a deficient number, since it is larger than the sum of its proper divisors (17760350).

25640098 is a wasteful number, since it uses less digits than its factorization.

25640098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 25640098 is about 5063.6052373778. The cubic root of 25640098 is about 294.8763170109.

The spelling of 25640098 in words is "twenty-five million, six hundred forty thousand, ninety-eight".