28621266 has 16 divisors (see below), whose sum is σ = 57313344. Its totient is φ = 9528624.

The previous prime is 28621259. The next prime is 28621267. The reversal of 28621266 is 66212682.

It is not an unprimeable number, because it can be changed into a prime (28621267) 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, 3336 + ... + 8268.

It is an arithmetic number, because the mean of its divisors is an integer number (3582084).

Almost surely, 2^28621266 is an apocalyptic number.

28621266 is an abundant number, since it is smaller than the sum of its proper divisors (28692078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28621266 is a wasteful number, since it uses less digits than its factorization.

28621266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5905.

The product of its digits is 13824, while the sum is 33.

The square root of 28621266 is about 5349.8846716541. The cubic root of 28621266 is about 305.8883568972. Note that the first 3 decimals are identical.

It can be divided in two parts, 2 and 8621266, that added together give a palindrome (8621268).

The spelling of 28621266 in words is "twenty-eight million, six hundred twenty-one thousand, two hundred sixty-six".