400242422 has 4 divisors (see below), whose sum is σ = 600363636. Its totient is φ = 200121210.

The previous prime is 400242331. The next prime is 400242439. The reversal of 400242422 is 224242004.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 400242394 and 400242403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060604 + ... + 100060607.

It is an arithmetic number, because the mean of its divisors is an integer number (150090909).

Almost surely, 2^400242422 is an apocalyptic number.

400242422 is a deficient number, since it is larger than the sum of its proper divisors (200121214).

400242422 is a wasteful number, since it uses less digits than its factorization.

400242422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200121213.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 400242422 is about 20006.0596320215. The cubic root of 400242422 is about 736.9551180488.

Adding to 400242422 its reverse (224242004), we get a palindrome (624484426).

The spelling of 400242422 in words is "four hundred million, two hundred forty-two thousand, four hundred twenty-two".