608644690 has 8 divisors (see below), whose sum is σ = 1095560460. Its totient is φ = 243457872.

The previous prime is 608644681. The next prime is 608644691. The reversal of 608644690 is 96446806.

It can be written as a sum of positive squares in 2 ways, for example, as 488807881 + 119836809 = 22109^2 + 10947^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×608644690² = 740896717330392200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (608644691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30432225 + ... + 30432244.

Almost surely, 2^608644690 is an apocalyptic number.

608644690 is a deficient number, since it is larger than the sum of its proper divisors (486915770).

608644690 is a wasteful number, since it uses less digits than its factorization.

608644690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60864476.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 608644690 is about 24670.7253642855. The cubic root of 608644690 is about 847.4640401492.

The spelling of 608644690 in words is "six hundred eight million, six hundred forty-four thousand, six hundred ninety".