19128764 has 6 divisors (see below), whose sum is σ = 33475344. Its totient is φ = 9564380.

The previous prime is 19128743. The next prime is 19128773. The reversal of 19128764 is 46782191.

It is a super-2 number, since 2×19128764² = 731819224335392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2391092 + ... + 2391099.

It is an arithmetic number, because the mean of its divisors is an integer number (5579224).

Almost surely, 2^19128764 is an apocalyptic number.

It is an amenable number.

19128764 is a deficient number, since it is larger than the sum of its proper divisors (14346580).

19128764 is a wasteful number, since it uses less digits than its factorization.

19128764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4782195 (or 4782193 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 19128764 is about 4373.6442470782. The cubic root of 19128764 is about 267.4416048618.

The spelling of 19128764 in words is "nineteen million, one hundred twenty-eight thousand, seven hundred sixty-four".