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28748506 = 214374253
BaseRepresentation
bin110110110101…
…0101011011010
32000002120112111
41231222223122
524324423011
62504102534
7466233613
oct155525332
960076474
1028748506
11152561a6
129764a4a
135c57467
143b64c0a
1527cd121
hex1b6aada

28748506 has 4 divisors (see below), whose sum is σ = 43122762. Its totient is φ = 14374252.

The previous prime is 28748477. The next prime is 28748509. The reversal of 28748506 is 60584782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27405225 + 1343281 = 5235^2 + 1159^2 .

It is not an unprimeable number, because it can be changed into a prime (28748509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7187125 + ... + 7187128.

Almost surely, 228748506 is an apocalyptic number.

28748506 is a deficient number, since it is larger than the sum of its proper divisors (14374256).

28748506 is a wasteful number, since it uses less digits than its factorization.

28748506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14374255.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 28748506 is about 5361.7633293535. The cubic root of 28748506 is about 306.3409772191.

The spelling of 28748506 in words is "twenty-eight million, seven hundred forty-eight thousand, five hundred six".

Divisors: 1 2 14374253 28748506