4891656 has 64 divisors (see below), whose sum is σ = 15252480. Its totient is φ = 1270080.

The previous prime is 4891643. The next prime is 4891661. The reversal of 4891656 is 6561984.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525 + ... + 3171.

It is an arithmetic number, because the mean of its divisors is an integer number (238320).

Almost surely, 2^4891656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4891656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7626240).

4891656 is an abundant number, since it is smaller than the sum of its proper divisors (10360824).

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

4891656 is a wasteful number, since it uses less digits than its factorization.

4891656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2674 (or 2670 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 4891656 is about 2211.7088415974. The cubic root of 4891656 is about 169.7534603954.

It can be divided in two parts, 489 and 1656, that added together give a triangular number (2145 = T₆₅).

The spelling of 4891656 in words is "four million, eight hundred ninety-one thousand, six hundred fifty-six".