405000450 has 36 divisors (see below), whose sum is σ = 1088102418. Its totient is φ = 108000000.

The previous prime is 405000437. The next prime is 405000473. The reversal of 405000450 is 54000504.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 351900081 + 53100369 = 18759^2 + 7287^2 .

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 17 ways as a sum of consecutive naturals, for example, 449551 + ... + 450450.

Almost surely, 2^405000450 is an apocalyptic number.

405000450 is an abundant number, since it is smaller than the sum of its proper divisors (683101968).

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

405000450 is a wasteful number, since it uses less digits than its factorization.

405000450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900019 (or 900011 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 405000450 is about 20124.6229778349. The cubic root of 405000450 is about 739.8638963226.

Adding to 405000450 its reverse (54000504), we get a palindrome (459000954).

It can be divided in two parts, 405000 and 450, that multiplied together give a square (182250000 = 13500²).

The spelling of 405000450 in words is "four hundred five million, four hundred fifty", and thus it is an aban number.