28967890 has 16 divisors (see below), whose sum is σ = 59591232. Its totient is φ = 9931824.

The previous prime is 28967831. The next prime is 28967891. The reversal of 28967890 is 9876982.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28967891) 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, 206844 + ... + 206983.

It is an arithmetic number, because the mean of its divisors is an integer number (3724452).

Almost surely, 2^28967890 is an apocalyptic number.

28967890 is an abundant number, since it is smaller than the sum of its proper divisors (30623342).

28967890 is a wasteful number, since it uses less digits than its factorization.

28967890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413841.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 28967890 is about 5382.1826427575. The cubic root of 28967890 is about 307.1182474809.

The spelling of 28967890 in words is "twenty-eight million, nine hundred sixty-seven thousand, eight hundred ninety".