4721040 has 120 divisors (see below), whose sum is σ = 16248960. Its totient is φ = 1228032.

The previous prime is 4721011. The next prime is 4721047. The reversal of 4721040 is 401274.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (4721047) 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, 56839 + ... + 56921.

It is an arithmetic number, because the mean of its divisors is an integer number (135408).

Almost surely, 2^4721040 is an apocalyptic number.

4721040 is a gapful number since it is divisible by the number (40) 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 4721040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8124480).

4721040 is an abundant number, since it is smaller than the sum of its proper divisors (11527920).

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

4721040 is a wasteful number, since it uses less digits than its factorization.

4721040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 4721040 is about 2172.7954344576. The cubic root of 4721040 is about 167.7564498162.

The spelling of 4721040 in words is "four million, seven hundred twenty-one thousand, forty".