402004243 has 8 divisors (see below), whose sum is σ = 406461888.
Its totient is φ = 397559784.
The previous prime is 402004217. The next prime is 402004247. The reversal of 402004243 is 342400204.
Adding to 402004243 its reverse (342400204), we get a palindrome (744404447).
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 402004243 - 29 = 402003731 is a prime.
It is a super-2 number, since 2×4020042432 = 323214822780006098, which contains 22 as substring.
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 402004243.
It is not an unprimeable number, because it can be changed into a prime (402004247) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65880 + ... + 71722.
It is an arithmetic number, because the mean of its divisors is an integer number (50807736).
Almost surely, 2402004243 is an apocalyptic number.
402004243 is a deficient number, since it is larger than the sum of its proper divisors (4457645).
402004243 is a wasteful number, since it uses less digits than its factorization.
402004243 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6593.
The product of its (nonzero) digits is 768, while the sum is 19.
The square root of 402004243 is about 20050.0434662870.
The cubic root of 402004243 is about 738.0348657769.
The spelling of 402004243 in words is "four hundred two million, four thousand, two hundred forty-three".