400505052 has 12 divisors (see below), whose sum is σ = 934511816. Its totient is φ = 133501680.

The previous prime is 400505033. The next prime is 400505059. The reversal of 400505052 is 250505004.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400505059) 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 3 ways as a sum of consecutive naturals, for example, 16687699 + ... + 16687722.

Almost surely, 2^400505052 is an apocalyptic number.

It is an amenable number.

400505052 is an abundant number, since it is smaller than the sum of its proper divisors (534006764).

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

400505052 is a wasteful number, since it uses less digits than its factorization.

400505052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33375428 (or 33375426 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 400505052 is about 20012.6223169279. The cubic root of 400505052 is about 737.1162738832.

The spelling of 400505052 in words is "four hundred million, five hundred five thousand, fifty-two".