1090431228 has 12 divisors (see below), whose sum is σ = 2544339560. Its totient is φ = 363477072.

The previous prime is 1090431217. The next prime is 1090431239. The reversal of 1090431228 is 8221340901.

It is an interprime number because it is at equal distance from previous prime (1090431217) and next prime (1090431239).

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1090431195 and 1090431204.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 45434623 + ... + 45434646.

Almost surely, 2^1090431228 is an apocalyptic number.

It is an amenable number.

1090431228 is an abundant number, since it is smaller than the sum of its proper divisors (1453908332).

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

1090431228 is a wasteful number, since it uses less digits than its factorization.

1090431228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90869276 (or 90869274 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1090431228 is about 33021.6781523895. The cubic root of 1090431228 is about 1029.2781658178.

The spelling of 1090431228 in words is "one billion, ninety million, four hundred thirty-one thousand, two hundred twenty-eight".