28372145 has 8 divisors (see below), whose sum is σ = 34272960. Its totient is φ = 22546800.

The previous prime is 28372117. The next prime is 28372151. The reversal of 28372145 is 54127382.

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

It is not a de Polignac number, because 28372145 - 2¹⁶ = 28306609 is a prime.

It is a super-2 number, since 2×28372145² = 1609957223802050, which contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 18035 + ... + 19544.

It is an arithmetic number, because the mean of its divisors is an integer number (4284120).

Almost surely, 2^28372145 is an apocalyptic number.

It is an amenable number.

28372145 is a deficient number, since it is larger than the sum of its proper divisors (5900815).

28372145 is a wasteful number, since it uses less digits than its factorization.

28372145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37735.

The product of its digits is 13440, while the sum is 32.

The square root of 28372145 is about 5326.5509478461. The cubic root of 28372145 is about 304.9982800225.

The spelling of 28372145 in words is "twenty-eight million, three hundred seventy-two thousand, one hundred forty-five".