4861640 has 64 divisors (see below), whose sum is σ = 12700800. Its totient is φ = 1640448.

The previous prime is 4861631. The next prime is 4861667. The reversal of 4861640 is 461684.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27071 + ... + 27249.

It is an arithmetic number, because the mean of its divisors is an integer number (198450).

Almost surely, 2^4861640 is an apocalyptic number.

4861640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4861640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6350400).

4861640 is an abundant number, since it is smaller than the sum of its proper divisors (7839160).

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

4861640 is a wasteful number, since it uses less digits than its factorization.

4861640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 4861640 is about 2204.9126966844. The cubic root of 4861640 is about 169.4055361310.

The spelling of 4861640 in words is "four million, eight hundred sixty-one thousand, six hundred forty".