3720424 has 16 divisors (see below), whose sum is σ = 7164900. Its totient is φ = 1809792.

The previous prime is 3720421. The next prime is 3720427. The reversal of 3720424 is 4240273.

It is an interprime number because it is at equal distance from previous prime (3720421) and next prime (3720427).

It can be written as a sum of positive squares in 2 ways, for example, as 2617924 + 1102500 = 1618^2 + 1050^2 .

It is a d-powerful number, because it can be written as 3¹² + 7⁷ + 2¹¹ + 0 + 4⁶ + 2²¹ + 4⁹ .

It is a junction number, because it is equal to n+sod(n) for n = 3720395 and 3720404.

It is not an unprimeable number, because it can be changed into a prime (3720421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5989 + ... + 6580.

Almost surely, 2^3720424 is an apocalyptic number.

It is an amenable number.

3720424 is a deficient number, since it is larger than the sum of its proper divisors (3444476).

3720424 is a wasteful number, since it uses less digits than its factorization.

3720424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12612 (or 12608 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 3720424 is about 1928.8400659464. The cubic root of 3720424 is about 154.9521045218.

Adding to 3720424 its reverse (4240273), we get a palindrome (7960697).

The spelling of 3720424 in words is "three million, seven hundred twenty thousand, four hundred twenty-four".