28831248 has 40 divisors (see below), whose sum is σ = 82757600. Its totient is φ = 9610272.

The previous prime is 28831247. The next prime is 28831261. The reversal of 28831248 is 84213882.

It is a happy number.

It is a super-2 number, since 2×28831248² = 1662481722475008, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (28831247) 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, 32938 + ... + 33801.

It is an arithmetic number, because the mean of its divisors is an integer number (2068940).

Almost surely, 2^28831248 is an apocalyptic number.

It is an amenable number.

28831248 is an abundant number, since it is smaller than the sum of its proper divisors (53926352).

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

28831248 is a wasteful number, since it uses less digits than its factorization.

28831248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66756 (or 66744 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 28831248 is about 5369.4737172278. The cubic root of 28831248 is about 306.6345923186.

The spelling of 28831248 in words is "twenty-eight million, eight hundred thirty-one thousand, two hundred forty-eight".