402444230 has 32 divisors (see below), whose sum is σ = 768818304. Its totient is φ = 151151616.

The previous prime is 402444193. The next prime is 402444239. The reversal of 402444230 is 32444204.

It is a super-2 number, since 2×402444230² = 323922716520585800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402444196 and 402444205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402444239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76154 + ... + 81266.

It is an arithmetic number, because the mean of its divisors is an integer number (24025572).

Almost surely, 2^402444230 is an apocalyptic number.

402444230 is a deficient number, since it is larger than the sum of its proper divisors (366374074).

402444230 is a wasteful number, since it uses less digits than its factorization.

402444230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5600.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 402444230 is about 20061.0126863028. The cubic root of 402444230 is about 738.3040232590.

Adding to 402444230 its reverse (32444204), we get a palindrome (434888434).

The spelling of 402444230 in words is "four hundred two million, four hundred forty-four thousand, two hundred thirty".