1090408020 has 48 divisors (see below), whose sum is σ = 3288001920. Its totient is φ = 268407936.

The previous prime is 1090408009. The next prime is 1090408021. The reversal of 1090408020 is 208040901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090408021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 698200 + ... + 699759.

It is an arithmetic number, because the mean of its divisors is an integer number (68500040).

Almost surely, 2^1090408020 is an apocalyptic number.

1090408020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1090408020 is an abundant number, since it is smaller than the sum of its proper divisors (2197593900).

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

1090408020 is a wasteful number, since it uses less digits than its factorization.

1090408020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397984 (or 1397982 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1090408020 is about 33021.3267449992. The cubic root of 1090408020 is about 1029.2708636128.

Adding to 1090408020 its reverse (208040901), we get a palindrome (1298448921).

The spelling of 1090408020 in words is "one billion, ninety million, four hundred eight thousand, twenty".