28871451 has 32 divisors (see below), whose sum is σ = 49221120. Its totient is φ = 16384032.

The previous prime is 28871429. The next prime is 28871459. The reversal of 28871451 is 15417882.

It is not a de Polignac number, because 28871451 - 2¹⁰ = 28870427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28871459) 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 31 ways as a sum of consecutive naturals, for example, 32256 + ... + 33138.

It is an arithmetic number, because the mean of its divisors is an integer number (1538160).

Almost surely, 2^28871451 is an apocalyptic number.

28871451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28871451 is a deficient number, since it is larger than the sum of its proper divisors (20349669).

28871451 is a wasteful number, since it uses less digits than its factorization.

28871451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072 (or 1066 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 28871451 is about 5373.2160760572. The cubic root of 28871451 is about 306.7770523903. Note that the first 3 decimals are identical.

The spelling of 28871451 in words is "twenty-eight million, eight hundred seventy-one thousand, four hundred fifty-one".