3620731 has 4 divisors (see below), whose sum is σ = 3626272. Its totient is φ = 3615192.

The previous prime is 3620723. The next prime is 3620741. The reversal of 3620731 is 1370263.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3620731 - 2³ = 3620723 is a prime.

It is a super-2 number, since 2×3620731² = 26219385948722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3620741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1635 + ... + 3148.

It is an arithmetic number, because the mean of its divisors is an integer number (906568).

Almost surely, 2^3620731 is an apocalyptic number.

3620731 is a deficient number, since it is larger than the sum of its proper divisors (5541).

3620731 is an equidigital number, since it uses as much as digits as its factorization.

3620731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5540.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 3620731 is about 1902.8218518821. The cubic root of 3620731 is about 153.5555154337. Note that the first 4 decimals are identical.

Adding to 3620731 its reverse (1370263), we get a palindrome (4990994).

The spelling of 3620731 in words is "three million, six hundred twenty thousand, seven hundred thirty-one".