19440172 has 6 divisors (see below), whose sum is σ = 34020308. Its totient is φ = 9720084.

The previous prime is 19440167. The next prime is 19440203. The reversal of 19440172 is 27104491.

It is a self number, because there is not a number n which added to its sum of digits gives 19440172.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2430018 + ... + 2430025.

Almost surely, 2^19440172 is an apocalyptic number.

It is an amenable number.

19440172 is a deficient number, since it is larger than the sum of its proper divisors (14580136).

19440172 is a wasteful number, since it uses less digits than its factorization.

19440172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860047 (or 4860045 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 19440172 is about 4409.1010421627. The cubic root of 19440172 is about 268.8850777969.

The spelling of 19440172 in words is "nineteen million, four hundred forty thousand, one hundred seventy-two".