4218790 has 24 divisors (see below), whose sum is σ = 7864560. Its totient is φ = 1629360.

The previous prime is 4218763. The next prime is 4218791. The reversal of 4218790 is 978124.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4218791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9391 + ... + 9829.

It is an arithmetic number, because the mean of its divisors is an integer number (327690).

Almost surely, 2^4218790 is an apocalyptic number.

4218790 is a deficient number, since it is larger than the sum of its proper divisors (3645770).

4218790 is a wasteful number, since it uses less digits than its factorization.

4218790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 4218790 is about 2053.9693279112. The cubic root of 4218790 is about 161.5831124316.

The spelling of 4218790 in words is "four million, two hundred eighteen thousand, seven hundred ninety".