28916019 has 12 divisors (see below), whose sum is σ = 45564792. Its totient is φ = 17524800.

The previous prime is 28916003. The next prime is 28916033. The reversal of 28916019 is 91061982.

It is not a de Polignac number, because 28916019 - 2⁴ = 28916003 is a prime.

It is a super-2 number, since 2×28916019² = 1672272309616722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28916039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145942 + ... + 146139.

It is an arithmetic number, because the mean of its divisors is an integer number (3797066).

Almost surely, 2^28916019 is an apocalyptic number.

28916019 is a deficient number, since it is larger than the sum of its proper divisors (16648773).

28916019 is a wasteful number, since it uses less digits than its factorization.

28916019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292098 (or 292095 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 28916019 is about 5377.3617137031. The cubic root of 28916019 is about 306.9348254380.

The spelling of 28916019 in words is "twenty-eight million, nine hundred sixteen thousand, nineteen".