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79312028 = 22181109547
BaseRepresentation
bin1001011101000…
…11010010011100
312112020110122112
410232203102130
5130300441103
611511533152
71652066255
oct456432234
9175213575
1079312028
1140851334
122268a1b8
131357c1c3
14a767b2c
156e69cd8
hex4ba349c

79312028 has 12 divisors (see below), whose sum is σ = 139564152. Its totient is φ = 39436560.

The previous prime is 79312019. The next prime is 79312031. The reversal of 79312028 is 82021397.

It is a junction number, because it is equal to n+sod(n) for n = 79311985 and 79312003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54050 + ... + 55497.

It is an arithmetic number, because the mean of its divisors is an integer number (11630346).

Almost surely, 279312028 is an apocalyptic number.

It is an amenable number.

79312028 is a deficient number, since it is larger than the sum of its proper divisors (60252124).

79312028 is a wasteful number, since it uses less digits than its factorization.

79312028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109732 (or 109730 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 79312028 is about 8905.7300655252. The cubic root of 79312028 is about 429.6482213960.

It can be divided in two parts, 793 and 12028, that added together give a palindrome (12821).

The spelling of 79312028 in words is "seventy-nine million, three hundred twelve thousand, twenty-eight".

Divisors: 1 2 4 181 362 724 109547 219094 438188 19828007 39656014 79312028