1090991370 has 192 divisors, whose sum is σ = 3191270400. Its totient is φ = 237726720.

The previous prime is 1090991359. The next prime is 1090991387. The reversal of 1090991370 is 731990901.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 4055596 + ... + 4055864.

It is an arithmetic number, because the mean of its divisors is an integer number (16621200).

Almost surely, 2^1090991370 is an apocalyptic number.

1090991370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1090991370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1595635200).

1090991370 is an abundant number, since it is smaller than the sum of its proper divisors (2100279030).

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

1090991370 is a wasteful number, since it uses less digits than its factorization.

1090991370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 1090991370 is about 33030.1584918995. The cubic root of 1090991370 is about 1029.4543784399.

The spelling of 1090991370 in words is "one billion, ninety million, nine hundred ninety-one thousand, three hundred seventy".