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78493808 = 244905863
BaseRepresentation
bin1001010110110…
…11100001110000
312110200220021002
410223123201300
5130043300213
611442221132
71642120631
oct453334160
9173626232
1078493808
1140342618
12223547a8
1313353953
14a5d3888
156d57658

78493808 has 10 divisors (see below), whose sum is σ = 152081784. Its totient is φ = 39246896.

The previous prime is 78493801. The next prime is 78493823. The reversal of 78493808 is 80839487.

It is a super-2 number, since 2×784938082 = 12322555788681728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78493801) by changing a digit.

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, 2452916 + ... + 2452947.

Almost surely, 278493808 is an apocalyptic number.

It is an amenable number.

78493808 is a deficient number, since it is larger than the sum of its proper divisors (73587976).

78493808 is a wasteful number, since it uses less digits than its factorization.

78493808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4905871 (or 4905865 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 78493808 is about 8859.6731316680. The cubic root of 78493808 is about 428.1656272241.

The spelling of 78493808 in words is "seventy-eight million, four hundred ninety-three thousand, eight hundred eight".