28392361 has 2 divisors, whose sum is σ = 28392362. Its totient is φ = 28392360.

The previous prime is 28392359. The next prime is 28392383. The reversal of 28392361 is 16329382.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19053225 + 9339136 = 4365^2 + 3056^2 .

It is a cyclic number.

It is not a de Polignac number, because 28392361 - 2¹ = 28392359 is a prime.

It is a super-2 number, since 2×28392361² = 1612252326308642, which contains 22 as substring.

Together with 28392359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28392761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14196180 + 14196181.

It is an arithmetic number, because the mean of its divisors is an integer number (14196181).

Almost surely, 2^28392361 is an apocalyptic number.

It is an amenable number.

28392361 is a deficient number, since it is larger than the sum of its proper divisors (1).

28392361 is an equidigital number, since it uses as much as digits as its factorization.

28392361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 28392361 is about 5328.4482731842. The cubic root of 28392361 is about 305.0707029496.

The spelling of 28392361 in words is "twenty-eight million, three hundred ninety-two thousand, three hundred sixty-one".