1090809432 has 48 divisors (see below), whose sum is σ = 3034128240. Its totient is φ = 353775168.

The previous prime is 1090809427. The next prime is 1090809439. The reversal of 1090809432 is 2349080901.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090809439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202068 + ... + 207395.

It is an arithmetic number, because the mean of its divisors is an integer number (63211005).

Almost surely, 2^1090809432 is an apocalyptic number.

1090809432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1090809432 is an abundant number, since it is smaller than the sum of its proper divisors (1943318808).

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

1090809432 is a wasteful number, since it uses less digits than its factorization.

1090809432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409512 (or 409505 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1090809432 is about 33027.4042576767. The cubic root of 1090809432 is about 1029.3971499752.

The spelling of 1090809432 in words is "one billion, ninety million, eight hundred nine thousand, four hundred thirty-two".