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819000074 = 2409500037
BaseRepresentation
bin110000110100001…
…111001100001010
32010002002111220002
4300310033030022
53134131000244
6213134003002
726203246214
oct6064171412
92102074802
10819000074
11390338972
121aa346462
131008a6139
147aab35b4
154bd7ba4e
hex30d0f30a

819000074 has 4 divisors (see below), whose sum is σ = 1228500114. Its totient is φ = 409500036.

The previous prime is 819000053. The next prime is 819000089. The reversal of 819000074 is 470000918.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 470000918 = 2235000459.

It can be written as a sum of positive squares in only one way, i.e., 810256225 + 8743849 = 28465^2 + 2957^2 .

It is a super-2 number, since 2×8190000742 = 1341522242424010952, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 204750017 + ... + 204750020.

Almost surely, 2819000074 is an apocalyptic number.

819000074 is a deficient number, since it is larger than the sum of its proper divisors (409500040).

819000074 is a wasteful number, since it uses less digits than its factorization.

819000074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409500039.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 819000074 is about 28618.1773353930. The cubic root of 819000074 is about 935.6095519139.

The spelling of 819000074 in words is "eight hundred nineteen million, seventy-four", and thus it is an aban number.

Divisors: 1 2 409500037 819000074