28973783 has 4 divisors (see below), whose sum is σ = 29098368. Its totient is φ = 28849200.

The previous prime is 28973771. The next prime is 28973837. The reversal of 28973783 is 38737982.

It is a happy number.

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 28973783 - 2²² = 24779479 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 (28973713) 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, 61943 + ... + 62408.

It is an arithmetic number, because the mean of its divisors is an integer number (7274592).

Almost surely, 2^28973783 is an apocalyptic number.

28973783 is a deficient number, since it is larger than the sum of its proper divisors (124585).

28973783 is a wasteful number, since it uses less digits than its factorization.

28973783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124584.

The product of its digits is 508032, while the sum is 47.

The square root of 28973783 is about 5382.7300693979. The cubic root of 28973783 is about 307.1390719768.

The spelling of 28973783 in words is "twenty-eight million, nine hundred seventy-three thousand, seven hundred eighty-three".