1000405450 has 24 divisors (see below), whose sum is σ = 2029914720. Its totient is φ = 363783600.

The previous prime is 1000405421. The next prime is 1000405457. The reversal of 1000405450 is 545040001.

It is a super-2 number, since 2×1000405450² = 2001622128779405000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1000405457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 908910 + ... + 910009.

It is an arithmetic number, because the mean of its divisors is an integer number (84579780).

Almost surely, 2^1000405450 is an apocalyptic number.

1000405450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000405450 is an abundant number, since it is smaller than the sum of its proper divisors (1029509270).

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

1000405450 is a wasteful number, since it uses less digits than its factorization.

1000405450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818942 (or 1818937 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1000405450 is about 31629.1866793947. The cubic root of 1000405450 is about 1000.1351317386.

Adding to 1000405450 its reverse (545040001), we get a palindrome (1545445451).

The spelling of 1000405450 in words is "one billion, four hundred five thousand, four hundred fifty".