78283305 has 24 divisors (see below), whose sum is σ = 139361352. Its totient is φ = 40621824.

The previous prime is 78283297. The next prime is 78283319. The reversal of 78283305 is 50338287.

78283305 is a `hidden beast` number, since 78 + 283 + 305 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 44515584 + 33767721 = 6672^2 + 5811^2 .

It is not a de Polignac number, because 78283305 - 2³ = 78283297 is a prime.

It is a super-2 number, since 2×78283305² = 12256551683446050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78283305.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21844 + ... + 25173.

It is an arithmetic number, because the mean of its divisors is an integer number (5806723).

Almost surely, 2^78283305 is an apocalyptic number.

It is an amenable number.

78283305 is a deficient number, since it is larger than the sum of its proper divisors (61078047).

78283305 is a wasteful number, since it uses less digits than its factorization.

78283305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47065 (or 47062 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 78283305 is about 8847.7853161116. The cubic root of 78283305 is about 427.7825361189.

The spelling of 78283305 in words is "seventy-eight million, two hundred eighty-three thousand, three hundred five".