405420352 has 28 divisors (see below), whose sum is σ = 851832180. Its totient is φ = 190785536.

The previous prime is 405420349. The next prime is 405420361. The reversal of 405420352 is 253024504.

It can be written as a sum of positive squares in 2 ways, for example, as 373880896 + 31539456 = 19336^2 + 5616^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185227 + ... + 187402.

Almost surely, 2^405420352 is an apocalyptic number.

It is an amenable number.

405420352 is an abundant number, since it is smaller than the sum of its proper divisors (446411828).

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

405420352 is a wasteful number, since it uses less digits than its factorization.

405420352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372658 (or 372648 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 405420352 is about 20135.0528184060. The cubic root of 405420352 is about 740.1195034662.

Adding to 405420352 its reverse (253024504), we get a palindrome (658444856).

The spelling of 405420352 in words is "four hundred five million, four hundred twenty thousand, three hundred fifty-two".