405648052 has 6 divisors (see below), whose sum is σ = 709884098. Its totient is φ = 202824024.

The previous prime is 405648049. The next prime is 405648053. The reversal of 405648052 is 250846504.

It can be written as a sum of positive squares in only one way, i.e., 233356176 + 172291876 = 15276^2 + 13126^2 .

It is a junction number, because it is equal to n+sod(n) for n = 405647999 and 405648017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405648053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50706003 + ... + 50706010.

Almost surely, 2^405648052 is an apocalyptic number.

It is an amenable number.

405648052 is a deficient number, since it is larger than the sum of its proper divisors (304236046).

405648052 is a wasteful number, since it uses less digits than its factorization.

405648052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101412017 (or 101412015 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 405648052 is about 20140.7063431251. The cubic root of 405648052 is about 740.2580375990.

The spelling of 405648052 in words is "four hundred five million, six hundred forty-eight thousand, fifty-two".