28694951 has 4 divisors (see below), whose sum is σ = 28724400. Its totient is φ = 28665504.

The previous prime is 28694947. The next prime is 28694977. The reversal of 28694951 is 15949682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28694951 - 2² = 28694947 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 (28694051) 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, 13211 + ... + 15228.

It is an arithmetic number, because the mean of its divisors is an integer number (7181100).

Almost surely, 2^28694951 is an apocalyptic number.

28694951 is a deficient number, since it is larger than the sum of its proper divisors (29449).

28694951 is a wasteful number, since it uses less digits than its factorization.

28694951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29448.

The product of its digits is 155520, while the sum is 44.

The square root of 28694951 is about 5356.7668420419. The cubic root of 28694951 is about 306.1506335410.

The spelling of 28694951 in words is "twenty-eight million, six hundred ninety-four thousand, nine hundred fifty-one".