402742212 has 12 divisors (see below), whose sum is σ = 939731856. Its totient is φ = 134247400.

The previous prime is 402742129. The next prime is 402742229. The reversal of 402742212 is 212247204.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16780914 + ... + 16780937.

It is an arithmetic number, because the mean of its divisors is an integer number (78310988).

Almost surely, 2^402742212 is an apocalyptic number.

It is an amenable number.

402742212 is an abundant number, since it is smaller than the sum of its proper divisors (536989644).

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

402742212 is a wasteful number, since it uses less digits than its factorization.

402742212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33561858 (or 33561856 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 402742212 is about 20068.4382053014. The cubic root of 402742212 is about 738.4861992532.

Adding to 402742212 its reverse (212247204), we get a palindrome (614989416).

It can be divided in two parts, 40274 and 2212, that added together give a triangular number (42486 = T₂₉₁).

The spelling of 402742212 in words is "four hundred two million, seven hundred forty-two thousand, two hundred twelve".