402012210204 has 72 divisors (see below), whose sum is σ = 1156778243712. Its totient is φ = 116525275680.

The previous prime is 402012210199. The next prime is 402012210233.

402012210204 is a `hidden beast` number, since 40 + 201 + 221 + 0 + 204 = 666.

402012210204 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×402012210204² (a number of 24 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22060074 + ... + 22078289.

It is an arithmetic number, because the mean of its divisors is an integer number (16066364496).

Almost surely, 2^402012210204 is an apocalyptic number.

402012210204 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

402012210204 is an abundant number, since it is smaller than the sum of its proper divisors (754766033508).

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

402012210204 is a wasteful number, since it uses less digits than its factorization.

402012210204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44138407 (or 44138402 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

It can be divided in two parts, 402012 and 210204, that added together give a palindrome (612216).

The spelling of 402012210204 in words is "four hundred two billion, twelve million, two hundred ten thousand, two hundred four".