4638608840 has 16 divisors (see below), whose sum is σ = 10436869980. Its totient is φ = 1855443520.

The previous prime is 4638608837. The next prime is 4638608857. The reversal of 4638608840 is 488068364.

It can be written as a sum of positive squares in 2 ways, for example, as 3843256036 + 795352804 = 61994^2 + 28202^2 .

It is a super-2 number, since 2×4638608840² = 43033383941052291200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57982571 + ... + 57982650.

Almost surely, 2^4638608840 is an apocalyptic number.

4638608840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4638608840 is an abundant number, since it is smaller than the sum of its proper divisors (5798261140).

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

4638608840 is a wasteful number, since it uses less digits than its factorization.

4638608840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115965232 (or 115965228 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 47.

The square root of 4638608840 is about 68107.3332321858. Note that the first 3 decimals coincide. The cubic root of 4638608840 is about 1667.7434760502.

The spelling of 4638608840 in words is "four billion, six hundred thirty-eight million, six hundred eight thousand, eight hundred forty".