28628829 has 16 divisors (see below), whose sum is σ = 43876800. Its totient is φ = 18427248.

The previous prime is 28628827. The next prime is 28628837. The reversal of 28628829 is 92882682.

It is not a de Polignac number, because 28628829 - 2¹ = 28628827 is a prime.

It is a super-2 number, since 2×28628829² = 1639219699822482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28628827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17499 + ... + 19064.

It is an arithmetic number, because the mean of its divisors is an integer number (2742300).

Almost surely, 2^28628829 is an apocalyptic number.

28628829 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28628829 is a deficient number, since it is larger than the sum of its proper divisors (15247971).

28628829 is a wasteful number, since it uses less digits than its factorization.

28628829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36601 (or 36595 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 28628829 is about 5350.5914626329. The cubic root of 28628829 is about 305.9152975865.

The spelling of 28628829 in words is "twenty-eight million, six hundred twenty-eight thousand, eight hundred twenty-nine".