402942811 has 4 divisors (see below), whose sum is σ = 402994800. Its totient is φ = 402890824.

The previous prime is 402942803. The next prime is 402942817. The reversal of 402942811 is 118249204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402942811 - 2³ = 402942803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402942817) 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 3 ways as a sum of consecutive naturals, for example, 11776 + ... + 30733.

It is an arithmetic number, because the mean of its divisors is an integer number (100748700).

Almost surely, 2^402942811 is an apocalyptic number.

402942811 is a deficient number, since it is larger than the sum of its proper divisors (51989).

402942811 is an equidigital number, since it uses as much as digits as its factorization.

402942811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51988.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 402942811 is about 20073.4354558456. The cubic root of 402942811 is about 738.6087880128.

The spelling of 402942811 in words is "four hundred two million, nine hundred forty-two thousand, eight hundred eleven".