28871408 has 10 divisors (see below), whose sum is σ = 55938384. Its totient is φ = 14435696.

The previous prime is 28871407. The next prime is 28871411. The reversal of 28871408 is 80417882.

It is a happy number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 902216 + ... + 902247.

Almost surely, 2^28871408 is an apocalyptic number.

It is an amenable number.

28871408 is a deficient number, since it is larger than the sum of its proper divisors (27066976).

28871408 is a wasteful number, since it uses less digits than its factorization.

28871408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804471 (or 1804465 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 28871408 is about 5373.2120747277. The cubic root of 28871408 is about 306.7769000896.

The spelling of 28871408 in words is "twenty-eight million, eight hundred seventy-one thousand, four hundred eight".