4722138 has 40 divisors (see below), whose sum is σ = 10721568. Its totient is φ = 1553256.

The previous prime is 4722121. The next prime is 4722163. The reversal of 4722138 is 8312274.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16545 + ... + 16827.

Almost surely, 2^4722138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4722138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5360784).

4722138 is an abundant number, since it is smaller than the sum of its proper divisors (5999430).

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

4722138 is a wasteful number, since it uses less digits than its factorization.

4722138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 391 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 4722138 is about 2173.0480896658. The cubic root of 4722138 is about 167.7694541756.

The spelling of 4722138 in words is "four million, seven hundred twenty-two thousand, one hundred thirty-eight".