400423505552 has 80 divisors (see below), whose sum is σ = 971180876160. Its totient is φ = 155945846784.

The previous prime is 400423505549. The next prime is 400423505557. The reversal of 400423505552 is 255505324004.

It is not an unprimeable number, because it can be changed into a prime (400423505557) 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, 3570758 + ... + 3681189.

It is an arithmetic number, because the mean of its divisors is an integer number (12139760952).

Almost surely, 2^400423505552 is an apocalyptic number.

It is an amenable number.

400423505552 is an abundant number, since it is smaller than the sum of its proper divisors (570757370608).

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

400423505552 is a wasteful number, since it uses less digits than its factorization.

400423505552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7252008 (or 7252002 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 35.

Adding to 400423505552 its reverse (255505324004), we get a palindrome (655928829556).

The spelling of 400423505552 in words is "four hundred billion, four hundred twenty-three million, five hundred five thousand, five hundred fifty-two".