78284308 has 12 divisors (see below), whose sum is σ = 137066580. Its totient is φ = 39122432.

The previous prime is 78284299. The next prime is 78284321. The reversal of 78284308 is 80348287.

It can be written as a sum of positive squares in 2 ways, for example, as 43850884 + 34433424 = 6622^2 + 5868^2 .

It is a super-2 number, since 2×78284308² = 12256865758077728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7458 + ... + 14566.

It is an arithmetic number, because the mean of its divisors is an integer number (11422215).

Almost surely, 2^78284308 is an apocalyptic number.

It is an amenable number.

78284308 is a deficient number, since it is larger than the sum of its proper divisors (58782272).

78284308 is a wasteful number, since it uses less digits than its factorization.

78284308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9866 (or 9864 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 78284308 is about 8847.8419967809. The cubic root of 78284308 is about 427.7843630902.

The spelling of 78284308 in words is "seventy-eight million, two hundred eighty-four thousand, three hundred eight".