28651011 has 8 divisors (see below), whose sum is σ = 38250240. Its totient is φ = 19076232.

The previous prime is 28651003. The next prime is 28651013. The reversal of 28651011 is 11015682.

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

It is not a de Polignac number, because 28651011 - 2³ = 28651003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28651013) 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, 3175 + ... + 8208.

It is an arithmetic number, because the mean of its divisors is an integer number (4781280).

Almost surely, 2^28651011 is an apocalyptic number.

28651011 is a deficient number, since it is larger than the sum of its proper divisors (9599229).

28651011 is a wasteful number, since it uses less digits than its factorization.

28651011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12225.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 28651011 is about 5352.6639162197. The cubic root of 28651011 is about 305.9942862789.

Adding to 28651011 its reverse (11015682), we get a palindrome (39666693).

The spelling of 28651011 in words is "twenty-eight million, six hundred fifty-one thousand, eleven".