1099326638 has 4 divisors (see below), whose sum is σ = 1648989960. Its totient is φ = 549663318.

The previous prime is 1099326623. The next prime is 1099326671. The reversal of 1099326638 is 8366239901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8366239901 = 733 ⋅11413697.

It is a junction number, because it is equal to n+sod(n) for n = 1099326592 and 1099326601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274831658 + ... + 274831661.

It is an arithmetic number, because the mean of its divisors is an integer number (412247490).

Almost surely, 2^1099326638 is an apocalyptic number.

1099326638 is a deficient number, since it is larger than the sum of its proper divisors (549663322).

1099326638 is an equidigital number, since it uses as much as digits as its factorization.

1099326638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549663321.

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 1099326638 is about 33156.0950354531. The cubic root of 1099326638 is about 1032.0694366426.

The spelling of 1099326638 in words is "one billion, ninety-nine million, three hundred twenty-six thousand, six hundred thirty-eight".