404212020 has 48 divisors (see below), whose sum is σ = 1132826688. Its totient is φ = 107691520.

The previous prime is 404212019. The next prime is 404212021. The reversal of 404212020 is 20212404.

It is an interprime number because it is at equal distance from previous prime (404212019) and next prime (404212021).

It is a super-2 number, since 2×404212020² = 326774714224960800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404212021) 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 15 ways as a sum of consecutive naturals, for example, 83260 + ... + 87980.

It is an arithmetic number, because the mean of its divisors is an integer number (23600556).

Almost surely, 2^404212020 is an apocalyptic number.

It is an amenable number.

404212020 is an abundant number, since it is smaller than the sum of its proper divisors (728614668).

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

404212020 is a wasteful number, since it uses less digits than its factorization.

404212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6160 (or 6158 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 404212020 is about 20105.0247450731. The cubic root of 404212020 is about 739.3834772411.

Adding to 404212020 its reverse (20212404), we get a palindrome (424424424).

The spelling of 404212020 in words is "four hundred four million, two hundred twelve thousand, twenty".