Search a number
28915748 = 2225792803
BaseRepresentation
bin110111001001…
…1100000100100
32000102001221122
41232103200210
524400300443
62511433112
7500531321
oct156234044
960361848
1028915748
111535a914
129825798
135cb5614
143ba9b48
152812968
hex1b93824

28915748 has 12 divisors (see below), whose sum is σ = 50640240. Its totient is φ = 14447112.

The previous prime is 28915729. The next prime is 28915751. The reversal of 28915748 is 84751982.

It is a super-2 number, since 2×289157482 = 1672240964799008, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28915699 and 28915708.

It is an unprimeable number.

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, 8915 + ... + 11717.

It is an arithmetic number, because the mean of its divisors is an integer number (4220020).

Almost surely, 228915748 is an apocalyptic number.

It is an amenable number.

28915748 is a deficient number, since it is larger than the sum of its proper divisors (21724492).

28915748 is a wasteful number, since it uses less digits than its factorization.

28915748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5386 (or 5384 counting only the distinct ones).

The product of its digits is 161280, while the sum is 44.

The square root of 28915748 is about 5377.3365154136. The cubic root of 28915748 is about 306.9338665739.

The spelling of 28915748 in words is "twenty-eight million, nine hundred fifteen thousand, seven hundred forty-eight".