28390379 has 8 divisors (see below), whose sum is σ = 28902720. Its totient is φ = 27880776.

The previous prime is 28390361. The next prime is 28390403. The reversal of 28390379 is 97309382.

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 28390379 - 2²⁰ = 27341803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28390339) 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, 42752 + ... + 43410.

It is an arithmetic number, because the mean of its divisors is an integer number (3612840).

Almost surely, 2^28390379 is an apocalyptic number.

28390379 is a deficient number, since it is larger than the sum of its proper divisors (512341).

28390379 is an equidigital number, since it uses as much as digits as its factorization.

28390379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 28390379 is about 5328.2622870876. The cubic root of 28390379 is about 305.0636040424.

The spelling of 28390379 in words is "twenty-eight million, three hundred ninety thousand, three hundred seventy-nine".