28860919 has 2 divisors, whose sum is σ = 28860920. Its totient is φ = 28860918.

The previous prime is 28860901. The next prime is 28860941. The reversal of 28860919 is 91906882.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28860919 - 2¹³ = 28852727 is a prime.

It is a super-2 number, since 2×28860919² = 1665905291049122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28860959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14430459 + 14430460.

It is an arithmetic number, because the mean of its divisors is an integer number (14430460).

Almost surely, 2^28860919 is an apocalyptic number.

28860919 is a deficient number, since it is larger than the sum of its proper divisors (1).

28860919 is an equidigital number, since it uses as much as digits as its factorization.

28860919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 28860919 is about 5372.2359404628. The cubic root of 28860919 is about 306.7397448453.

The spelling of 28860919 in words is "twenty-eight million, eight hundred sixty thousand, nine hundred nineteen".