400522052 has 24 divisors (see below), whose sum is σ = 843205440. Its totient is φ = 162617760.

The previous prime is 400522051. The next prime is 400522063. The reversal of 400522052 is 250225004.

It is not an unprimeable number, because it can be changed into a prime (400522051) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 375899 + ... + 376962.

It is an arithmetic number, because the mean of its divisors is an integer number (35133560).

Almost surely, 2^400522052 is an apocalyptic number.

It is an amenable number.

400522052 is an abundant number, since it is smaller than the sum of its proper divisors (442683388).

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

400522052 is a wasteful number, since it uses less digits than its factorization.

400522052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752891 (or 752889 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 400522052 is about 20013.0470443658. The cubic root of 400522052 is about 737.1267030478.

Adding to 400522052 its reverse (250225004), we get a palindrome (650747056).

The spelling of 400522052 in words is "four hundred million, five hundred twenty-two thousand, fifty-two".