220501404 has 36 divisors (see below), whose sum is σ = 557859120. Its totient is φ = 73437120.

The previous prime is 220501387. The next prime is 220501409. The reversal of 220501404 is 404105022.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220501409) 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 11 ways as a sum of consecutive naturals, for example, 60177 + ... + 63735.

Almost surely, 2^220501404 is an apocalyptic number.

It is an amenable number.

220501404 is an abundant number, since it is smaller than the sum of its proper divisors (337357716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220501404 is a wasteful number, since it uses less digits than its factorization.

220501404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290 (or 5285 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 220501404 is about 14849.2896799813. The cubic root of 220501404 is about 604.1393440475.

Adding to 220501404 its reverse (404105022), we get a palindrome (624606426).

The spelling of 220501404 in words is "two hundred twenty million, five hundred one thousand, four hundred four".