610642638 has 20 divisors (see below), whose sum is σ = 1368292200. Its totient is φ = 203547492.

The previous prime is 610642633. The next prime is 610642649. The reversal of 610642638 is 836246016.

610642638 is a `hidden beast` number, since 6 + 1 + 0 + 642 + 6 + 3 + 8 = 666.

610642638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610642631) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1884538 + ... + 1884861.

It is an arithmetic number, because the mean of its divisors is an integer number (68414610).

Almost surely, 2^610642638 is an apocalyptic number.

610642638 is an abundant number, since it is smaller than the sum of its proper divisors (757649562).

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

610642638 is a wasteful number, since it uses less digits than its factorization.

610642638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769413 (or 3769404 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 610642638 is about 24711.1844718136. The cubic root of 610642638 is about 848.3903275687.

The spelling of 610642638 in words is "six hundred ten million, six hundred forty-two thousand, six hundred thirty-eight".