28714939 has 4 divisors (see below), whose sum is σ = 31325400. Its totient is φ = 26104480.

The previous prime is 28714919. The next prime is 28714949. The reversal of 28714939 is 93941782.

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 28714939 - 2¹¹ = 28712891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28714895 and 28714904.

It is not an unprimeable number, because it can be changed into a prime (28714919) 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, 1305214 + ... + 1305235.

It is an arithmetic number, because the mean of its divisors is an integer number (7831350).

Almost surely, 2^28714939 is an apocalyptic number.

28714939 is a deficient number, since it is larger than the sum of its proper divisors (2610461).

28714939 is a wasteful number, since it uses less digits than its factorization.

28714939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610460.

The product of its digits is 108864, while the sum is 43.

The square root of 28714939 is about 5358.6321948796. The cubic root of 28714939 is about 306.2217020084.

The spelling of 28714939 in words is "twenty-eight million, seven hundred fourteen thousand, nine hundred thirty-nine".