1090209020 has 12 divisors (see below), whose sum is σ = 2289438984. Its totient is φ = 436083600.

The previous prime is 1090209017. The next prime is 1090209061. The reversal of 1090209020 is 209020901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27255206 + ... + 27255245.

It is an arithmetic number, because the mean of its divisors is an integer number (190786582).

Almost surely, 2^1090209020 is an apocalyptic number.

1090209020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1090209020 is an abundant number, since it is smaller than the sum of its proper divisors (1199229964).

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

1090209020 is a wasteful number, since it uses less digits than its factorization.

1090209020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54510460 (or 54510458 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1090209020 is about 33018.3134033221. The cubic root of 1090209020 is about 1029.2082456571.

Adding to 1090209020 its reverse (209020901), we get a palindrome (1299229921).

The spelling of 1090209020 in words is "one billion, ninety million, two hundred nine thousand, twenty".