28961347 has 16 divisors (see below), whose sum is σ = 31518720. Its totient is φ = 26532000.

The previous prime is 28961329. The next prime is 28961357. The reversal of 28961347 is 74316982.

It is a cyclic number.

It is not a de Polignac number, because 28961347 - 2¹¹ = 28959299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28961357) 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, 107529 + ... + 107797.

It is an arithmetic number, because the mean of its divisors is an integer number (1969920).

Almost surely, 2^28961347 is an apocalyptic number.

28961347 is a deficient number, since it is larger than the sum of its proper divisors (2557373).

28961347 is a wasteful number, since it uses less digits than its factorization.

28961347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474.

The product of its digits is 72576, while the sum is 40.

The square root of 28961347 is about 5381.5747695261. The cubic root of 28961347 is about 307.0951227268.

The spelling of 28961347 in words is "twenty-eight million, nine hundred sixty-one thousand, three hundred forty-seven".