4691988 has 72 divisors (see below), whose sum is σ = 13901888. Its totient is φ = 1306368.

The previous prime is 4691969. The next prime is 4691989. The reversal of 4691988 is 8891964.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4691989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10620 + ... + 11052.

Almost surely, 2^4691988 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 4691988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6950944).

4691988 is an abundant number, since it is smaller than the sum of its proper divisors (9209900).

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

4691988 is a wasteful number, since it uses less digits than its factorization.

4691988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 488 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 4691988 is about 2166.0997206962. The cubic root of 4691988 is about 167.4116323070.

The spelling of 4691988 in words is "four million, six hundred ninety-one thousand, nine hundred eighty-eight".