28630747 has 4 divisors (see below), whose sum is σ = 28759360. Its totient is φ = 28502136.

The previous prime is 28630717. The next prime is 28630757. The reversal of 28630747 is 74703682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74703682 = 2 ⋅37351841.

It is a cyclic number.

It is not a de Polignac number, because 28630747 - 2⁷ = 28630619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28630717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63972 + ... + 64417.

It is an arithmetic number, because the mean of its divisors is an integer number (7189840).

Almost surely, 2^28630747 is an apocalyptic number.

28630747 is a deficient number, since it is larger than the sum of its proper divisors (128613).

28630747 is a wasteful number, since it uses less digits than its factorization.

28630747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128612.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 28630747 is about 5350.7706921527. The cubic root of 28630747 is about 305.9221290737.

The spelling of 28630747 in words is "twenty-eight million, six hundred thirty thousand, seven hundred forty-seven".