28922047 has 32 divisors (see below), whose sum is σ = 38776320. Its totient is φ = 20891520.

The previous prime is 28922041. The next prime is 28922053. The reversal of 28922047 is 74022982.

It is an interprime number because it is at equal distance from previous prime (28922041) and next prime (28922053).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28922047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28922041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77353 + ... + 77725.

It is an arithmetic number, because the mean of its divisors is an integer number (1211760).

Almost surely, 2^28922047 is an apocalyptic number.

28922047 is a deficient number, since it is larger than the sum of its proper divisors (9854273).

28922047 is a wasteful number, since it uses less digits than its factorization.

28922047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28922047 is about 5377.9221824047. The cubic root of 28922047 is about 306.9561524238.

The spelling of 28922047 in words is "twenty-eight million, nine hundred twenty-two thousand, forty-seven".