4721838 has 32 divisors (see below), whose sum is σ = 10661760. Its totient is φ = 1380960.

The previous prime is 4721819. The next prime is 4721839. The reversal of 4721838 is 8381274.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4721799 and 4721808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4721839) 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, 681 + ... + 3147.

It is an arithmetic number, because the mean of its divisors is an integer number (333180).

Almost surely, 2^4721838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4721838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5330880).

4721838 is an abundant number, since it is smaller than the sum of its proper divisors (5939922).

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

4721838 is a wasteful number, since it uses less digits than its factorization.

4721838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512.

The product of its digits is 10752, while the sum is 33.

The square root of 4721838 is about 2172.9790611048. The cubic root of 4721838 is about 167.7659012721.

The spelling of 4721838 in words is "four million, seven hundred twenty-one thousand, eight hundred thirty-eight".