402040212 has 24 divisors (see below), whose sum is σ = 1072107456. Its totient is φ = 114868608.

The previous prime is 402040201. The next prime is 402040229. The reversal of 402040212 is 212040204.

It is a junction number, because it is equal to n+sod(n) for n = 402040191 and 402040200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2393013 + ... + 2393180.

It is an arithmetic number, because the mean of its divisors is an integer number (44671144).

Almost surely, 2^402040212 is an apocalyptic number.

402040212 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

402040212 is an abundant number, since it is smaller than the sum of its proper divisors (670067244).

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

402040212 is a wasteful number, since it uses less digits than its factorization.

402040212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4786207 (or 4786205 counting only the distinct ones).

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

The square root of 402040212 is about 20050.9404268229. The cubic root of 402040212 is about 738.0568768086.

Adding to 402040212 its reverse (212040204), we get a palindrome (614080416).

The spelling of 402040212 in words is "four hundred two million, forty thousand, two hundred twelve".