28871403 has 8 divisors (see below), whose sum is σ = 41994816. Its totient is φ = 17497800.

The previous prime is 28871399. The next prime is 28871407. The reversal of 28871403 is 30417882.

It is an interprime number because it is at equal distance from previous prime (28871399) and next prime (28871407).

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

It is not a de Polignac number, because 28871403 - 2² = 28871399 is a prime.

It is a super-2 number, since 2×28871403² = 1667115822376818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 874891 = 28871403 / (2 + 8 + 8 + 7 + 1 + 4 + 0 + 3).

It is not an unprimeable number, because it can be changed into a prime (28871407) 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, 437413 + ... + 437478.

It is an arithmetic number, because the mean of its divisors is an integer number (5249352).

Almost surely, 2^28871403 is an apocalyptic number.

28871403 is a deficient number, since it is larger than the sum of its proper divisors (13123413).

28871403 is a wasteful number, since it uses less digits than its factorization.

28871403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874905.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 28871403 is about 5373.2116094567. The cubic root of 28871403 is about 306.7768823803.

The spelling of 28871403 in words is "twenty-eight million, eight hundred seventy-one thousand, four hundred three".