4891992 has 64 divisors (see below), whose sum is σ = 14373120. Its totient is φ = 1358208.

The previous prime is 4891979. The next prime is 4891993. The reversal of 4891992 is 2991984.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5823 + ... + 6609.

It is an arithmetic number, because the mean of its divisors is an integer number (224580).

Almost surely, 2^4891992 is an apocalyptic number.

4891992 is a gapful number since it is divisible by the number (42) 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 4891992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7186560).

4891992 is an abundant number, since it is smaller than the sum of its proper divisors (9481128).

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

4891992 is a wasteful number, since it uses less digits than its factorization.

4891992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 836 counting only the distinct ones).

The product of its digits is 46656, while the sum is 42.

The square root of 4891992 is about 2211.7847996584. The cubic root of 4891992 is about 169.7573470040.

The spelling of 4891992 in words is "four million, eight hundred ninety-one thousand, nine hundred ninety-two".