4040720 has 40 divisors (see below), whose sum is σ = 9581976. Its totient is φ = 1584128.

The previous prime is 4040719. The next prime is 4040723. The reversal of 4040720 is 270404.

It can be written as a sum of positive squares in 4 ways, for example, as 595984 + 3444736 = 772^2 + 1856^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (4040723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3764 + ... + 4716.

Almost surely, 2^4040720 is an apocalyptic number.

4040720 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 4040720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4790988).

4040720 is an abundant number, since it is smaller than the sum of its proper divisors (5541256).

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

4040720 is a wasteful number, since it uses less digits than its factorization.

4040720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019 (or 1013 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 4040720 is about 2010.1542229391. The cubic root of 4040720 is about 159.2769457085.

The spelling of 4040720 in words is "four million, forty thousand, seven hundred twenty".