28808451 has 12 divisors (see below), whose sum is σ = 47556912. Its totient is φ = 16461936.

The previous prime is 28808449. The next prime is 28808453. The reversal of 28808451 is 15480882.

It is an interprime number because it is at equal distance from previous prime (28808449) and next prime (28808453).

It is not a de Polignac number, because 28808451 - 2¹ = 28808449 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28808453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228576 + ... + 228701.

It is an arithmetic number, because the mean of its divisors is an integer number (3963076).

Almost surely, 2^28808451 is an apocalyptic number.

28808451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28808451 is a deficient number, since it is larger than the sum of its proper divisors (18748461).

28808451 is a wasteful number, since it uses less digits than its factorization.

28808451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457290 (or 457287 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 28808451 is about 5367.3504636832. The cubic root of 28808451 is about 306.5537518818.

The spelling of 28808451 in words is "twenty-eight million, eight hundred eight thousand, four hundred fifty-one".