400420442 has 8 divisors (see below), whose sum is σ = 600715776. Its totient is φ = 200181852.

The previous prime is 400420439. The next prime is 400420453. The reversal of 400420442 is 244024004.

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, 18773 + ... + 33959.

It is an arithmetic number, because the mean of its divisors is an integer number (75089472).

Almost surely, 2^400420442 is an apocalyptic number.

400420442 is a deficient number, since it is larger than the sum of its proper divisors (200295334).

400420442 is a wasteful number, since it uses less digits than its factorization.

400420442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28372.

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

The square root of 400420442 is about 20010.5082893963. The cubic root of 400420442 is about 737.0643629272.

Adding to 400420442 its reverse (244024004), we get a palindrome (644444446).

The spelling of 400420442 in words is "four hundred million, four hundred twenty thousand, four hundred forty-two".