28992747 has 8 divisors (see below), whose sum is σ = 44179456. Its totient is φ = 16567272.

The previous prime is 28992739. The next prime is 28992767. The reversal of 28992747 is 74729982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28992747 - 2³ = 28992739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28992696 and 28992705.

It is not an unprimeable number, because it can be changed into a prime (28992767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 690283 + ... + 690324.

It is an arithmetic number, because the mean of its divisors is an integer number (5522432).

Almost surely, 2^28992747 is an apocalyptic number.

28992747 is a deficient number, since it is larger than the sum of its proper divisors (15186709).

28992747 is a wasteful number, since it uses less digits than its factorization.

28992747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380617.

The product of its digits is 508032, while the sum is 48.

The square root of 28992747 is about 5384.4913408789. The cubic root of 28992747 is about 307.2060671986.

The spelling of 28992747 in words is "twenty-eight million, nine hundred ninety-two thousand, seven hundred forty-seven".