78867946 has 4 divisors (see below), whose sum is σ = 118301922. Its totient is φ = 39433972.

The previous prime is 78867941. The next prime is 78867949. The reversal of 78867946 is 64976887.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72165025 + 6702921 = 8495^2 + 2589^2 .

It is not an unprimeable number, because it can be changed into a prime (78867941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19716985 + ... + 19716988.

Almost surely, 2^78867946 is an apocalyptic number.

78867946 is a deficient number, since it is larger than the sum of its proper divisors (39433976).

78867946 is a wasteful number, since it uses less digits than its factorization.

78867946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39433975.

The product of its digits is 4064256, while the sum is 55.

The square root of 78867946 is about 8880.7626924719. The cubic root of 78867946 is about 428.8448280817.

The spelling of 78867946 in words is "seventy-eight million, eight hundred sixty-seven thousand, nine hundred forty-six".