400000031142 has 32 divisors (see below), whose sum is σ = 842558277120. Its totient is φ = 126247857120.

The previous prime is 400000031131. The next prime is 400000031267. The reversal of 400000031142 is 241130000004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730558 + ... + 1154865.

It is an arithmetic number, because the mean of its divisors is an integer number (26329946160).

Almost surely, 2^400000031142 is an apocalyptic number.

400000031142 is an abundant number, since it is smaller than the sum of its proper divisors (442558245978).

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

400000031142 is a wasteful number, since it uses less digits than its factorization.

400000031142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887308.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 400000031142 its reverse (241130000004), we get a palindrome (641130031146).

The spelling of 400000031142 in words is "four hundred billion, thirty-one thousand, one hundred forty-two".