78042308 has 24 divisors (see below), whose sum is σ = 145138392. Its totient is φ = 36591104.

The previous prime is 78042301. The next prime is 78042317. The reversal of 78042308 is 80324087.

It can be written as a sum of positive squares in 4 ways, for example, as 54051904 + 23990404 = 7352^2 + 4898^2 .

It is not an unprimeable number, because it can be changed into a prime (78042301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17966 + ... + 21882.

It is an arithmetic number, because the mean of its divisors is an integer number (6047433).

Almost surely, 2^78042308 is an apocalyptic number.

It is an amenable number.

78042308 is a deficient number, since it is larger than the sum of its proper divisors (67096084).

78042308 is a wasteful number, since it uses less digits than its factorization.

78042308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231 (or 4229 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 78042308 is about 8834.1557604561. The cubic root of 78042308 is about 427.3431053364.

The spelling of 78042308 in words is "seventy-eight million, forty-two thousand, three hundred eight".