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28449638530 = 2517331641641
BaseRepresentation
bin11010011111101110…
…110000100010000010
32201102201000101020221
4122133232300202002
5431231101413110
621023010253254
72025002636365
oct323756604202
981381011227
1028449638530
111107a096565
12561b88722a
1328b511c051
14153c5960dc
15b179827da
hex69fbb0882

28449638530 has 16 divisors (see below), whose sum is σ = 51238930104. Its totient is φ = 11373281920.

The previous prime is 28449638501. The next prime is 28449638593. The reversal of 28449638530 is 3583694482.

It can be written as a sum of positive squares in 4 ways, for example, as 21503582881 + 6946055649 = 146641^2 + 83343^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 803491 + ... + 838150.

Almost surely, 228449638530 is an apocalyptic number.

28449638530 is a deficient number, since it is larger than the sum of its proper divisors (22789291574).

28449638530 is a wasteful number, since it uses less digits than its factorization.

28449638530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643381.

The product of its (nonzero) digits is 4976640, while the sum is 52.

The spelling of 28449638530 in words is "twenty-eight billion, four hundred forty-nine million, six hundred thirty-eight thousand, five hundred thirty".

Divisors: 1 2 5 10 1733 3466 8665 17330 1641641 3283282 8208205 16416410 2844963853 5689927706 14224819265 28449638530