405520452 has 96 divisors (see below), whose sum is σ = 1116057600. Its totient is φ = 127058976.

The previous prime is 405520447. The next prime is 405520469. The reversal of 405520452 is 254025504.

405520452 is a `hidden beast` number, since 405 + 5 + 204 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145173 + ... + 147939.

It is an arithmetic number, because the mean of its divisors is an integer number (11625600).

Almost surely, 2^405520452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405520452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (558028800).

405520452 is an abundant number, since it is smaller than the sum of its proper divisors (710537148).

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

405520452 is a wasteful number, since it uses less digits than its factorization.

405520452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862 (or 2854 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 405520452 is about 20137.5383798517. The cubic root of 405520452 is about 740.1804113325.

Adding to 405520452 its reverse (254025504), we get a palindrome (659545956).

The spelling of 405520452 in words is "four hundred five million, five hundred twenty thousand, four hundred fifty-two".