400042060 has 24 divisors (see below), whose sum is σ = 916460496. Its totient is φ = 145469760.

The previous prime is 400042031. The next prime is 400042061. The reversal of 400042060 is 60240004.

It is not an unprimeable number, because it can be changed into a prime (400042061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 908967 + ... + 909406.

It is an arithmetic number, because the mean of its divisors is an integer number (38185854).

Almost surely, 2^400042060 is an apocalyptic number.

It is an amenable number.

400042060 is an abundant number, since it is smaller than the sum of its proper divisors (516418436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400042060 is a wasteful number, since it uses less digits than its factorization.

400042060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818393 (or 1818391 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400042060 is about 20001.0514723601. The cubic root of 400042060 is about 736.8321238838.

Adding to 400042060 its reverse (60240004), we get a palindrome (460282064).

The spelling of 400042060 in words is "four hundred million, forty-two thousand, sixty".