3658438 has 16 divisors (see below), whose sum is σ = 6400800. Its totient is φ = 1567608.

The previous prime is 3658429. The next prime is 3658439. The reversal of 3658438 is 8348563.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3658397 and 3658406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3658439) by changing a digit.

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, 1981 + ... + 3352.

It is an arithmetic number, because the mean of its divisors is an integer number (400050).

Almost surely, 2^3658438 is an apocalyptic number.

3658438 is a deficient number, since it is larger than the sum of its proper divisors (2742362).

3658438 is an equidigital number, since it uses as much as digits as its factorization.

3658438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356 (or 5342 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 3658438 is about 1912.7043681657. The cubic root of 3658438 is about 154.0867280078.

It can be divided in two parts, 3658 and 438, that added together give a 12-th power (4096 = 2¹²).

The spelling of 3658438 in words is "three million, six hundred fifty-eight thousand, four hundred thirty-eight".