4639931840 has 28 divisors (see below), whose sum is σ = 11048838456. Its totient is φ = 1855972608.

The previous prime is 4639931827. The next prime is 4639931861. The reversal of 4639931840 is 481399364.

It is a happy number.

It is a congruent number.

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, 7249574 + ... + 7250213.

Almost surely, 2^4639931840 is an apocalyptic number.

4639931840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4639931840 is an abundant number, since it is smaller than the sum of its proper divisors (6408906616).

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

4639931840 is a wasteful number, since it uses less digits than its factorization.

4639931840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14499804 (or 14499794 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 4639931840 is about 68117.0451502412. The cubic root of 4639931840 is about 1667.9020160320.

The spelling of 4639931840 in words is "four billion, six hundred thirty-nine million, nine hundred thirty-one thousand, eight hundred forty".