402444330023 has 4 divisors (see below), whose sum is σ = 402457120968. Its totient is φ = 402431539080.

The previous prime is 402444329999. The next prime is 402444330031. The reversal of 402444330023 is 320033444204.

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 402444330023 - 2¹⁶ = 402444264487 is a prime.

It is a super-2 number, since 2×402444330023² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402444330523) 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, 6348161 + ... + 6411242.

It is an arithmetic number, because the mean of its divisors is an integer number (100614280242).

Almost surely, 2^402444330023 is an apocalyptic number.

402444330023 is a deficient number, since it is larger than the sum of its proper divisors (12790945).

402444330023 is a wasteful number, since it uses less digits than its factorization.

402444330023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12790944.

The product of its (nonzero) digits is 27648, while the sum is 29.

Adding to 402444330023 its reverse (320033444204), we get a palindrome (722477774227).

The spelling of 402444330023 in words is "four hundred two billion, four hundred forty-four million, three hundred thirty thousand, twenty-three".