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28831450451 = 79364955069
BaseRepresentation
bin11010110110011111…
…010000010101010011
32202102022110102202012
4122312133100111103
5433021322403301
621124530013135
72040320166566
oct326637202523
982368412665
1028831450451
1111255669501
1257077171ab
132946262b6b
1415771844dd
15b3b251ebb
hex6b67d0553

28831450451 has 4 divisors (see below), whose sum is σ = 29196405600. Its totient is φ = 28466495304.

The previous prime is 28831450433. The next prime is 28831450471. The reversal of 28831450451 is 15405413882.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-28831450451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28831450399 and 28831450408.

It is not an unprimeable number, because it can be changed into a prime (28831450411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182477456 + ... + 182477613.

It is an arithmetic number, because the mean of its divisors is an integer number (7299101400).

Almost surely, 228831450451 is an apocalyptic number.

28831450451 is a deficient number, since it is larger than the sum of its proper divisors (364955149).

28831450451 is an equidigital number, since it uses as much as digits as its factorization.

28831450451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364955148.

The product of its (nonzero) digits is 153600, while the sum is 41.

The spelling of 28831450451 in words is "twenty-eight billion, eight hundred thirty-one million, four hundred fifty thousand, four hundred fifty-one".

Divisors: 1 79 364955069 28831450451