28340961 has 8 divisors (see below), whose sum is σ = 41223264. Its totient is φ = 17176320.

The previous prime is 28340959. The next prime is 28340969. The reversal of 28340961 is 16904382.

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

It is not a de Polignac number, because 28340961 - 2¹ = 28340959 is a prime.

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: 858817 = 28340961 / (2 + 8 + 3 + 4 + 0 + 9 + 6 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28340969) 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, 429376 + ... + 429441.

It is an arithmetic number, because the mean of its divisors is an integer number (5152908).

Almost surely, 2^28340961 is an apocalyptic number.

It is an amenable number.

28340961 is a deficient number, since it is larger than the sum of its proper divisors (12882303).

28340961 is a wasteful number, since it uses less digits than its factorization.

28340961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858831.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28340961 is about 5323.6229205307. The cubic root of 28340961 is about 304.8864972270.

The spelling of 28340961 in words is "twenty-eight million, three hundred forty thousand, nine hundred sixty-one".