Search a number
28894472 = 234776847
BaseRepresentation
bin110111000111…
…0010100001000
32000100222202122
41232032110020
524344110342
62511150412
7500412305
oct156162410
960328678
1028894472
1115345932
129815408
135ca8a29
143ba20ac
15280b4d2
hex1b8e508

28894472 has 16 divisors (see below), whose sum is σ = 55330560. Its totient is φ = 14139664.

The previous prime is 28894471. The next prime is 28894501. The reversal of 28894472 is 27449882.

It is not an unprimeable number, because it can be changed into a prime (28894471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38048 + ... + 38799.

It is an arithmetic number, because the mean of its divisors is an integer number (3458160).

Almost surely, 228894472 is an apocalyptic number.

It is an amenable number.

28894472 is a deficient number, since it is larger than the sum of its proper divisors (26436088).

28894472 is a wasteful number, since it uses less digits than its factorization.

28894472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76900 (or 76896 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 28894472 is about 5375.3578485530. The cubic root of 28894472 is about 306.8585681903.

The spelling of 28894472 in words is "twenty-eight million, eight hundred ninety-four thousand, four hundred seventy-two".