78917058 has 32 divisors (see below), whose sum is σ = 191315520. Its totient is φ = 23914080.

The previous prime is 78917029. The next prime is 78917081. The reversal of 78917058 is 85071987.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65835 + ... + 67022.

It is an arithmetic number, because the mean of its divisors is an integer number (5978610).

Almost surely, 2^78917058 is an apocalyptic number.

78917058 is an abundant number, since it is smaller than the sum of its proper divisors (112398462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78917058 is a wasteful number, since it uses less digits than its factorization.

78917058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132879 (or 132873 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 78917058 is about 8883.5273399703. The cubic root of 78917058 is about 428.9338251882.

The spelling of 78917058 in words is "seventy-eight million, nine hundred seventeen thousand, fifty-eight".