1100997638 has 8 divisors (see below), whose sum is σ = 1778534688. Its totient is φ = 508152744.

The previous prime is 1100997637. The next prime is 1100997647. The reversal of 1100997638 is 8367990011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100997631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21173006 + ... + 21173057.

It is an arithmetic number, because the mean of its divisors is an integer number (222316836).

Almost surely, 2^1100997638 is an apocalyptic number.

1100997638 is a deficient number, since it is larger than the sum of its proper divisors (677537050).

1100997638 is a wasteful number, since it uses less digits than its factorization.

1100997638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42346078.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 1100997638 is about 33181.2844537399. The cubic root of 1100997638 is about 1032.5920944535.

The spelling of 1100997638 in words is "one billion, one hundred million, nine hundred ninety-seven thousand, six hundred thirty-eight".