402144442 has 8 divisors (see below), whose sum is σ = 689390496. Its totient is φ = 172347612.

The previous prime is 402144433. The next prime is 402144467. The reversal of 402144442 is 244441204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14362288 + ... + 14362315.

It is an arithmetic number, because the mean of its divisors is an integer number (86173812).

Almost surely, 2^402144442 is an apocalyptic number.

402144442 is a deficient number, since it is larger than the sum of its proper divisors (287246054).

402144442 is a wasteful number, since it uses less digits than its factorization.

402144442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28724612.

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 402144442 is about 20053.5393883474. The cubic root of 402144442 is about 738.1206523705.

Adding to 402144442 its reverse (244441204), we get a palindrome (646585646).

The spelling of 402144442 in words is "four hundred two million, one hundred forty-four thousand, four hundred forty-two".