1000431220 has 24 divisors (see below), whose sum is σ = 2102010624. Its totient is φ = 399962016.

The previous prime is 1000431209. The next prime is 1000431227. The reversal of 1000431220 is 221340001.

It is a self number, because there is not a number n which added to its sum of digits gives 1000431220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000431227) 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 7 ways as a sum of consecutive naturals, for example, 29137 + ... + 53383.

It is an arithmetic number, because the mean of its divisors is an integer number (87583776).

Almost surely, 2^1000431220 is an apocalyptic number.

1000431220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000431220 is an abundant number, since it is smaller than the sum of its proper divisors (1101579404).

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

1000431220 is a wasteful number, since it uses less digits than its factorization.

1000431220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26319 (or 26317 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1000431220 is about 31629.5940536707. The cubic root of 1000431220 is about 1000.1437193438.

Adding to 1000431220 its reverse (221340001), we get a palindrome (1221771221).

The spelling of 1000431220 in words is "one billion, four hundred thirty-one thousand, two hundred twenty".