28831011 has 8 divisors (see below), whose sum is σ = 41936064. Its totient is φ = 17473320.

The previous prime is 28831007. The next prime is 28831073. The reversal of 28831011 is 11013882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28831011 - 2² = 28831007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28831081) 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, 436801 + ... + 436866.

It is an arithmetic number, because the mean of its divisors is an integer number (5242008).

Almost surely, 2^28831011 is an apocalyptic number.

28831011 is a deficient number, since it is larger than the sum of its proper divisors (13105053).

28831011 is a wasteful number, since it uses less digits than its factorization.

28831011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873681.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 28831011 is about 5369.4516479805. The cubic root of 28831011 is about 306.6337521122.

Adding to 28831011 its reverse (11013882), we get a palindrome (39844893).

The spelling of 28831011 in words is "twenty-eight million, eight hundred thirty-one thousand, eleven".