400323531442254 has 64 divisors (see below), whose sum is σ = 923137269143040. Its totient is φ = 113364176808960.

The previous prime is 400323531442193. The next prime is 400323531442277. The reversal of 400323531442254 is 452244135323004.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 317965969 + ... + 319222499.

It is an arithmetic number, because the mean of its divisors is an integer number (14424019830360).

Almost surely, 2^{400323531442254} is an apocalyptic number.

400323531442254 is an abundant number, since it is smaller than the sum of its proper divisors (522813737700786).

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

400323531442254 is a wasteful number, since it uses less digits than its factorization.

400323531442254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323785.

The product of its (nonzero) digits is 1382400, while the sum is 42.

Adding to 400323531442254 its reverse (452244135323004), we get a palindrome (852567666765258).

The spelling of 400323531442254 in words is "four hundred trillion, three hundred twenty-three billion, five hundred thirty-one million, four hundred forty-two thousand, two hundred fifty-four".