402238711 has 4 divisors (see below), whose sum is σ = 459701392. Its totient is φ = 344776032.

The previous prime is 402238709. The next prime is 402238723. The reversal of 402238711 is 117832204.

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 402238711 - 2¹ = 402238709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402238711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402238511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28731330 + ... + 28731343.

It is an arithmetic number, because the mean of its divisors is an integer number (114925348).

Almost surely, 2^402238711 is an apocalyptic number.

402238711 is a deficient number, since it is larger than the sum of its proper divisors (57462681).

402238711 is an equidigital number, since it uses as much as digits as its factorization.

402238711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57462680.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 402238711 is about 20055.8896835817. The cubic root of 402238711 is about 738.1783235720.

The spelling of 402238711 in words is "four hundred two million, two hundred thirty-eight thousand, seven hundred eleven".