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28033442 = 217824513
BaseRepresentation
bin110101011110…
…0000110100010
31221202020122122
41222330012202
524134032232
62440504242
7460165103
oct152740642
957666578
1028033442
1114907a38
12947b082
135a66b48
143a1a3aa
1526db312
hex1abc1a2

28033442 has 8 divisors (see below), whose sum is σ = 44523756. Its totient is φ = 13192192.

The previous prime is 28033441. The next prime is 28033451. The reversal of 28033442 is 24433082.

It can be written as a sum of positive squares in 2 ways, for example, as 20802721 + 7230721 = 4561^2 + 2689^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28033441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412223 + ... + 412290.

Almost surely, 228033442 is an apocalyptic number.

28033442 is a deficient number, since it is larger than the sum of its proper divisors (16490314).

28033442 is a wasteful number, since it uses less digits than its factorization.

28033442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824532.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 28033442 is about 5294.6616511350. The cubic root of 28033442 is about 303.7797414809.

The spelling of 28033442 in words is "twenty-eight million, thirty-three thousand, four hundred forty-two".

Divisors: 1 2 17 34 824513 1649026 14016721 28033442