28871958 has 8 divisors (see below), whose sum is σ = 57743928. Its totient is φ = 9623984.

The previous prime is 28871957. The next prime is 28871977. The reversal of 28871958 is 85917882.

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

28871958 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28871957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2405991 + ... + 2406002.

It is an arithmetic number, because the mean of its divisors is an integer number (7217991).

Almost surely, 2^28871958 is an apocalyptic number.

28871958 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28871958 is a wasteful number, since it uses less digits than its factorization.

28871958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4811998.

The product of its digits is 322560, while the sum is 48.

The square root of 28871958 is about 5373.2632542990. The cubic root of 28871958 is about 306.7788481094.

The spelling of 28871958 in words is "twenty-eight million, eight hundred seventy-one thousand, nine hundred fifty-eight".