3503720 has 32 divisors (see below), whose sum is σ = 8601120. Its totient is φ = 1273920.

The previous prime is 3503719. The next prime is 3503761. The reversal of 3503720 is 273053.

3503720 is nontrivially palindromic in base 3.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 3503692 and 3503701.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3542 + ... + 4421.

It is an arithmetic number, because the mean of its divisors is an integer number (268785).

Almost surely, 2^3503720 is an apocalyptic number.

It is an amenable number.

3503720 is an abundant number, since it is smaller than the sum of its proper divisors (5097400).

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

3503720 is a wasteful number, since it uses less digits than its factorization.

3503720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7985 (or 7981 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 20.

The square root of 3503720 is about 1871.8226411709. The cubic root of 3503720 is about 151.8832205523.

Adding to 3503720 its reverse (273053), we get a palindrome (3776773).

The spelling of 3503720 in words is "three million, five hundred three thousand, seven hundred twenty".