19440812 has 6 divisors (see below), whose sum is σ = 34021428. Its totient is φ = 9720404.

The previous prime is 19440803. The next prime is 19440829. The reversal of 19440812 is 21804491.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2430098 + ... + 2430105.

It is an arithmetic number, because the mean of its divisors is an integer number (5670238).

Almost surely, 2^19440812 is an apocalyptic number.

It is an amenable number.

19440812 is a deficient number, since it is larger than the sum of its proper divisors (14580616).

19440812 is a wasteful number, since it uses less digits than its factorization.

19440812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4860207 (or 4860205 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 19440812 is about 4409.1736187181. The cubic root of 19440812 is about 268.8880284663. Note that the first 3 decimals are identical.

The spelling of 19440812 in words is "nineteen million, four hundred forty thousand, eight hundred twelve".