28963747 has 4 divisors (see below), whose sum is σ = 29191936. Its totient is φ = 28735560.

The previous prime is 28963717. The next prime is 28963757. The reversal of 28963747 is 74736982.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28963747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28963697 and 28963706.

It is not an unprimeable number, because it can be changed into a prime (28963717) 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, 113904 + ... + 114157.

It is an arithmetic number, because the mean of its divisors is an integer number (7297984).

Almost surely, 2^28963747 is an apocalyptic number.

28963747 is a deficient number, since it is larger than the sum of its proper divisors (228189).

28963747 is a wasteful number, since it uses less digits than its factorization.

28963747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228188.

The product of its digits is 508032, while the sum is 46.

The square root of 28963747 is about 5381.7977479649. The cubic root of 28963747 is about 307.1036053886.

The spelling of 28963747 in words is "twenty-eight million, nine hundred sixty-three thousand, seven hundred forty-seven".