402120612 has 60 divisors (see below), whose sum is σ = 1087497180. Its totient is φ = 129415104.

The previous prime is 402120611. The next prime is 402120629. The reversal of 402120612 is 216021204.

402120612 is a `hidden beast` number, since 40 + 2 + 12 + 0 + 612 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 318836736 + 83283876 = 17856^2 + 9126^2 .

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

It is not an unprimeable number, because it can be changed into a prime (402120611) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12003 + ... + 30794.

It is an arithmetic number, because the mean of its divisors is an integer number (18124953).

Almost surely, 2^402120612 is an apocalyptic number.

It is an amenable number.

402120612 is an abundant number, since it is smaller than the sum of its proper divisors (685376568).

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

402120612 is a wasteful number, since it uses less digits than its factorization.

402120612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42842 (or 42831 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 402120612 is about 20052.9452200917. The cubic root of 402120612 is about 738.1060723998.

Adding to 402120612 its reverse (216021204), we get a palindrome (618141816).

The spelling of 402120612 in words is "four hundred two million, one hundred twenty thousand, six hundred twelve".