78396982 has 4 divisors (see below), whose sum is σ = 117595476. Its totient is φ = 39198490.

The previous prime is 78396977. The next prime is 78397001. The reversal of 78396982 is 28969387.

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

It is a super-2 number, since 2×78396982² = 12292173573416648, 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 as a sum of consecutive naturals, namely, 19599244 + ... + 19599247.

It is an arithmetic number, because the mean of its divisors is an integer number (29398869).

Almost surely, 2^78396982 is an apocalyptic number.

78396982 is a deficient number, since it is larger than the sum of its proper divisors (39198494).

78396982 is a wasteful number, since it uses less digits than its factorization.

78396982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39198493.

The product of its digits is 1306368, while the sum is 52.

The square root of 78396982 is about 8854.2070226531. The cubic root of 78396982 is about 427.9895002810.

The spelling of 78396982 in words is "seventy-eight million, three hundred ninety-six thousand, nine hundred eighty-two".