401400442 has 32 divisors (see below), whose sum is σ = 627891264. Its totient is φ = 192326400.

The previous prime is 401400437. The next prime is 401400449. The reversal of 401400442 is 244004104.

It is a super-2 number, since 2×401400442² = 322244629675590728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401400449) 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, 1665442 + ... + 1665682.

It is an arithmetic number, because the mean of its divisors is an integer number (19621602).

Almost surely, 2^401400442 is an apocalyptic number.

401400442 is a deficient number, since it is larger than the sum of its proper divisors (226490822).

401400442 is a wasteful number, since it uses less digits than its factorization.

401400442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 401400442 is about 20034.9804591869. The cubic root of 401400442 is about 737.6651769068.

Adding to 401400442 its reverse (244004104), we get a palindrome (645404546).

The spelling of 401400442 in words is "four hundred one million, four hundred thousand, four hundred forty-two".