28945319 has 8 divisors (see below), whose sum is σ = 31464720. Its totient is φ = 26467776.

The previous prime is 28945309. The next prime is 28945327. The reversal of 28945319 is 91354982.

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 28945319 - 2¹⁶ = 28879783 is a prime.

It is a super-2 number, since 2×28945319² = 1675662984023522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28945309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9014 + ... + 11795.

It is an arithmetic number, because the mean of its divisors is an integer number (3933090).

Almost surely, 2^28945319 is an apocalyptic number.

28945319 is a deficient number, since it is larger than the sum of its proper divisors (2519401).

28945319 is a wasteful number, since it uses less digits than its factorization.

28945319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20929.

The product of its digits is 77760, while the sum is 41.

The square root of 28945319 is about 5380.0854082440. The cubic root of 28945319 is about 307.0384606648.

The spelling of 28945319 in words is "twenty-eight million, nine hundred forty-five thousand, three hundred nineteen".