28947605 has 8 divisors (see below), whose sum is σ = 34844064. Its totient is φ = 23086800.

The previous prime is 28947601. The next prime is 28947619. The reversal of 28947605 is 50674982.

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

It is not a de Polignac number, because 28947605 - 2² = 28947601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28947601) 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, 7091 + ... + 10400.

It is an arithmetic number, because the mean of its divisors is an integer number (4355508).

Almost surely, 2^28947605 is an apocalyptic number.

It is an amenable number.

28947605 is a deficient number, since it is larger than the sum of its proper divisors (5896459).

28947605 is a wasteful number, since it uses less digits than its factorization.

28947605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17827.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 28947605 is about 5380.2978542084. The cubic root of 28947605 is about 307.0465433930.

The spelling of 28947605 in words is "twenty-eight million, nine hundred forty-seven thousand, six hundred five".