28150705 has 8 divisors (see below), whose sum is σ = 36851904. Its totient is φ = 20473200.

The previous prime is 28150699. The next prime is 28150711. The reversal of 28150705 is 50705182.

It is an interprime number because it is at equal distance from previous prime (28150699) and next prime (28150711).

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

It is a de Polignac number, because none of the positive numbers 2^k-28150705 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255861 + ... + 255970.

It is an arithmetic number, because the mean of its divisors is an integer number (4606488).

Almost surely, 2^28150705 is an apocalyptic number.

It is an amenable number.

28150705 is a deficient number, since it is larger than the sum of its proper divisors (8701199).

28150705 is a wasteful number, since it uses less digits than its factorization.

28150705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511847.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 28150705 is about 5305.7237960527. The cubic root of 28150705 is about 304.2027192728.

Adding to 28150705 its reverse (50705182), we get a palindrome (78855887).

The spelling of 28150705 in words is "twenty-eight million, one hundred fifty thousand, seven hundred five".