19328865 has 16 divisors (see below), whose sum is σ = 30984768. Its totient is φ = 10289216.

The previous prime is 19328863. The next prime is 19328879. The reversal of 19328865 is 56882391.

It is a cyclic number.

It is not a de Polignac number, because 19328865 - 2¹ = 19328863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19328863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10762 + ... + 12428.

It is an arithmetic number, because the mean of its divisors is an integer number (1936548).

Almost surely, 2^19328865 is an apocalyptic number.

19328865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19328865 is a deficient number, since it is larger than the sum of its proper divisors (11655903).

19328865 is a wasteful number, since it uses less digits than its factorization.

19328865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448.

The product of its digits is 103680, while the sum is 42.

The square root of 19328865 is about 4396.4605081816. The cubic root of 19328865 is about 268.3709174966.

The spelling of 19328865 in words is "nineteen million, three hundred twenty-eight thousand, eight hundred sixty-five".