3720638 has 16 divisors (see below), whose sum is σ = 5720976. Its totient is φ = 1814400.

The previous prime is 3720623. The next prime is 3720649. The reversal of 3720638 is 8360273.

It is a self number, because there is not a number n which added to its sum of digits gives 3720638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22745 + ... + 22907.

It is an arithmetic number, because the mean of its divisors is an integer number (357561).

Almost surely, 2^3720638 is an apocalyptic number.

3720638 is a deficient number, since it is larger than the sum of its proper divisors (2000338).

3720638 is a wasteful number, since it uses less digits than its factorization.

3720638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 3720638 is about 1928.8955389030. The cubic root of 3720638 is about 154.9550754300.

The spelling of 3720638 in words is "three million, seven hundred twenty thousand, six hundred thirty-eight".