28601011 has 4 divisors (see below), whose sum is σ = 28614024. Its totient is φ = 28588000.

The previous prime is 28600981. The next prime is 28601039. The reversal of 28601011 is 11010682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28601011 - 2⁷ = 28600883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28601011.

It is not an unprimeable number, because it can be changed into a prime (28604011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2305 + ... + 7906.

It is an arithmetic number, because the mean of its divisors is an integer number (7153506).

Almost surely, 2^28601011 is an apocalyptic number.

28601011 is a deficient number, since it is larger than the sum of its proper divisors (13013).

28601011 is a wasteful number, since it uses less digits than its factorization.

28601011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13012.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 28601011 is about 5347.9913051537. The cubic root of 28601011 is about 305.8161817669.

Adding to 28601011 its reverse (11010682), we get a palindrome (39611693).

The spelling of 28601011 in words is "twenty-eight million, six hundred one thousand, eleven".