28967919 has 16 divisors (see below), whose sum is σ = 40473600. Its totient is φ = 18406080.

The previous prime is 28967909. The next prime is 28967947. The reversal of 28967919 is 91976982.

It is a happy number.

It is not a de Polignac number, because 28967919 - 2⁴ = 28967903 is a prime.

It is a super-2 number, since 2×28967919² = 1678280662381122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28967909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3907 + ... + 8555.

It is an arithmetic number, because the mean of its divisors is an integer number (2529600).

Almost surely, 2^28967919 is an apocalyptic number.

28967919 is a deficient number, since it is larger than the sum of its proper divisors (11505681).

28967919 is a wasteful number, since it uses less digits than its factorization.

28967919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4750.

The product of its digits is 489888, while the sum is 51.

The square root of 28967919 is about 5382.1853368311. The cubic root of 28967919 is about 307.1183499671.

The spelling of 28967919 in words is "twenty-eight million, nine hundred sixty-seven thousand, nine hundred nineteen".