1090198020 has 24 divisors (see below), whose sum is σ = 3052554624. Its totient is φ = 290719456.

The previous prime is 1090198019. The next prime is 1090198037. The reversal of 1090198020 is 208910901.

It is a super-3 number, since 3×1090198020³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9084924 + ... + 9085043.

It is an arithmetic number, because the mean of its divisors is an integer number (127189776).

Almost surely, 2^1090198020 is an apocalyptic number.

1090198020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1090198020 is an abundant number, since it is smaller than the sum of its proper divisors (1962356604).

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

1090198020 is a wasteful number, since it uses less digits than its factorization.

1090198020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18169979 (or 18169977 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1090198020 is about 33018.1468286759. The cubic root of 1090198020 is about 1029.2047841408.

The spelling of 1090198020 in words is "one billion, ninety million, one hundred ninety-eight thousand, twenty".