3523720 has 16 divisors (see below), whose sum is σ = 7928460. Its totient is φ = 1409472.

The previous prime is 3523711. The next prime is 3523763. The reversal of 3523720 is 273253.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2979076 + 544644 = 1726^2 + 738^2 .

It is an Ulam number.

It is a d-powerful number, because it can be written as 3⁹ + 5 + 2¹⁹ + 3¹⁰ + 7⁷ + 2²¹ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 3523691 and 3523700.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44007 + ... + 44086.

Almost surely, 2^3523720 is an apocalyptic number.

It is an amenable number.

3523720 is an abundant number, since it is smaller than the sum of its proper divisors (4404740).

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

3523720 is a wasteful number, since it uses less digits than its factorization.

3523720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88104 (or 88100 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 22.

The square root of 3523720 is about 1877.1574254708. The cubic root of 3523720 is about 152.1716666217.

Adding to 3523720 its reverse (273253), we get a palindrome (3796973).

The spelling of 3523720 in words is "three million, five hundred twenty-three thousand, seven hundred twenty".