28871502 has 32 divisors (see below), whose sum is σ = 63431424. Its totient is φ = 8688000.

The previous prime is 28871497. The next prime is 28871519. The reversal of 28871502 is 20517882.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8518 + ... + 11414.

It is an arithmetic number, because the mean of its divisors is an integer number (1982232).

Almost surely, 2^28871502 is an apocalyptic number.

28871502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28871502 is an abundant number, since it is smaller than the sum of its proper divisors (34559922).

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

28871502 is a wasteful number, since it uses less digits than its factorization.

28871502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 28871502 is about 5373.2208218163. The cubic root of 28871502 is about 306.7772330257. Note that the first 3 decimals are identical.

The spelling of 28871502 in words is "twenty-eight million, eight hundred seventy-one thousand, five hundred two".