4890640 has 40 divisors (see below), whose sum is σ = 11492568. Its totient is φ = 1935360.

The previous prime is 4890637. The next prime is 4890659. The reversal of 4890640 is 460984.

It can be written as a sum of positive squares in 4 ways, for example, as 15376 + 4875264 = 124^2 + 2208^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8770 + ... + 9310.

Almost surely, 2^4890640 is an apocalyptic number.

4890640 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 4890640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5746284).

4890640 is an abundant number, since it is smaller than the sum of its proper divisors (6601928).

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

4890640 is a wasteful number, since it uses less digits than its factorization.

4890640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 4890640 is about 2211.4791430172. The cubic root of 4890640 is about 169.7417069484.

The spelling of 4890640 in words is "four million, eight hundred ninety thousand, six hundred forty".