259640604 has 18 divisors (see below), whose sum is σ = 656313840. Its totient is φ = 86546856.

The previous prime is 259640597. The next prime is 259640617. The reversal of 259640604 is 406046952.

259640604 is a `hidden beast` number, since 2 + 5 + 9 + 6 + 40 + 604 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 7212239 = 259640604 / (2 + 5 + 9 + 6 + 4 + 0 + 6 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3606084 + ... + 3606155.

It is an arithmetic number, because the mean of its divisors is an integer number (36461880).

Almost surely, 2^259640604 is an apocalyptic number.

It is an amenable number.

259640604 is an abundant number, since it is smaller than the sum of its proper divisors (396673236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

259640604 is a wasteful number, since it uses less digits than its factorization.

259640604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7212249 (or 7212244 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 259640604 is about 16113.3672458614. The cubic root of 259640604 is about 637.9562113925.

The spelling of 259640604 in words is "two hundred fifty-nine million, six hundred forty thousand, six hundred four".