3502720 has 64 divisors (see below), whose sum is σ = 9039240. Its totient is φ = 1290240.

The previous prime is 3502711. The next prime is 3502727. The reversal of 3502720 is 272053.

3502720 = T₂₀ + T₂₁ + ... + T₂₇₅.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 968256 + 2534464 = 984^2 + 1592^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (3502727) 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, 8110 + ... + 8530.

Almost surely, 2^3502720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3502720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4519620).

3502720 is an abundant number, since it is smaller than the sum of its proper divisors (5536520).

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

3502720 is a wasteful number, since it uses less digits than its factorization.

3502720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 3502720 is about 1871.5555027837. Note that the first 4 decimals coincide. The cubic root of 3502720 is about 151.8687694667.

Adding to 3502720 its reverse (272053), we get a palindrome (3774773).

The spelling of 3502720 in words is "three million, five hundred two thousand, seven hundred twenty".