1099021904 has 40 divisors (see below), whose sum is σ = 2169132000. Its totient is φ = 539307648.

The previous prime is 1099021901. The next prime is 1099021909. The reversal of 1099021904 is 4091209901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099021901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312347 + ... + 315845.

It is an arithmetic number, because the mean of its divisors is an integer number (54228300).

Almost surely, 2^1099021904 is an apocalyptic number.

It is an amenable number.

1099021904 is a deficient number, since it is larger than the sum of its proper divisors (1070110096).

1099021904 is a wasteful number, since it uses less digits than its factorization.

1099021904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867 (or 3861 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 1099021904 is about 33151.4992722803. The cubic root of 1099021904 is about 1031.9740644084.

The spelling of 1099021904 in words is "one billion, ninety-nine million, twenty-one thousand, nine hundred four".