400511052 has 36 divisors (see below), whose sum is σ = 1056422640. Its totient is φ = 127698912.

The previous prime is 400511011. The next prime is 400511063. The reversal of 400511052 is 250115004.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241027 + ... + 242682.

Almost surely, 2^400511052 is an apocalyptic number.

It is an amenable number.

400511052 is an abundant number, since it is smaller than the sum of its proper divisors (655911588).

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

400511052 is a wasteful number, since it uses less digits than its factorization.

400511052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483742 (or 483737 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 400511052 is about 20012.7722217588. The cubic root of 400511052 is about 737.1199547985.

Adding to 400511052 its reverse (250115004), we get a palindrome (650626056).

The spelling of 400511052 in words is "four hundred million, five hundred eleven thousand, fifty-two".