28871803 has 8 divisors (see below), whose sum is σ = 30213648. Its totient is φ = 27559584.

The previous prime is 28871789. The next prime is 28871809. The reversal of 28871803 is 30817882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28871803 is a prime.

It is a super-3 number, since 3×28871803³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28871809) 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, 5401 + ... + 9322.

It is an arithmetic number, because the mean of its divisors is an integer number (3776706).

Almost surely, 2^28871803 is an apocalyptic number.

28871803 is a deficient number, since it is larger than the sum of its proper divisors (1341845).

28871803 is a wasteful number, since it uses less digits than its factorization.

28871803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14813.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 28871803 is about 5373.2488310146. The cubic root of 28871803 is about 306.7782991246.

The spelling of 28871803 in words is "twenty-eight million, eight hundred seventy-one thousand, eight hundred three".