28372019 has 8 divisors (see below), whose sum is σ = 30658320. Its totient is φ = 26100576.

The previous prime is 28372009. The next prime is 28372039. The reversal of 28372019 is 91027382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28372019 - 2¹² = 28367923 is a prime.

It is a super-2 number, since 2×28372019² = 1609942924272722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28372009) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 437 + ... + 7545.

It is an arithmetic number, because the mean of its divisors is an integer number (3832290).

Almost surely, 2^28372019 is an apocalyptic number.

28372019 is a deficient number, since it is larger than the sum of its proper divisors (2286301).

28372019 is a wasteful number, since it uses less digits than its factorization.

28372019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7429.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 28372019 is about 5326.5391202919. The cubic root of 28372019 is about 304.9978285253.

The spelling of 28372019 in words is "twenty-eight million, three hundred seventy-two thousand, nineteen".