612640008 has 36 divisors (see below), whose sum is σ = 1659802365. Its totient is φ = 204143328.

The previous prime is 612640003. The next prime is 612640013. The reversal of 612640008 is 800046216.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

612640008 is a `hidden beast` number, since 6 + 12 + 640 + 0 + 0 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (612640003) and next prime (612640013).

It can be written as a sum of positive squares in 2 ways, for example, as 328987044 + 283652964 = 18138^2 + 16842^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=17502.

It is not an unprimeable number, because it can be changed into a prime (612640003) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 208566 + ... + 211482.

Almost surely, 2^612640008 is an apocalyptic number.

It is an amenable number.

612640008 is an abundant number, since it is smaller than the sum of its proper divisors (1047162357).

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

612640008 is an equidigital number, since it uses as much as digits as its factorization.

612640008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5846 (or 2922 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 612640008 is about 24751.5657686539. The cubic root of 612640008 is about 849.3143296219.

The spelling of 612640008 in words is "six hundred twelve million, six hundred forty thousand, eight".