28405058 has 8 divisors (see below), whose sum is σ = 46481040. Its totient is φ = 12911380.

The previous prime is 28405051. The next prime is 28405093. The reversal of 28405058 is 85050482.

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

It is not an unprimeable number, because it can be changed into a prime (28405051) 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, 645548 + ... + 645591.

It is an arithmetic number, because the mean of its divisors is an integer number (5810130).

Almost surely, 2^28405058 is an apocalyptic number.

28405058 is a deficient number, since it is larger than the sum of its proper divisors (18075982).

28405058 is a wasteful number, since it uses less digits than its factorization.

28405058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291152.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 28405058 is about 5329.6395750557. The cubic root of 28405058 is about 305.1161718165.

The spelling of 28405058 in words is "twenty-eight million, four hundred five thousand, fifty-eight".