68978115 has 32 divisors (see below), whose sum is σ = 124027200. Its totient is φ = 36368640.

The previous prime is 68978089. The next prime is 68978141. The reversal of 68978115 is 51187986.

It is an interprime number because it is at equal distance from previous prime (68978089) and next prime (68978141).

It is not a de Polignac number, because 68978115 - 2⁹ = 68977603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9145 + ... + 14885.

It is an arithmetic number, because the mean of its divisors is an integer number (3875850).

Almost surely, 2^68978115 is an apocalyptic number.

68978115 is a deficient number, since it is larger than the sum of its proper divisors (55049085).

68978115 is a wasteful number, since it uses less digits than its factorization.

68978115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5844 (or 5838 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 68978115 is about 8305.3064362491. The cubic root of 68978115 is about 410.1132247276.

The spelling of 68978115 in words is "sixty-eight million, nine hundred seventy-eight thousand, one hundred fifteen".