78982378 has 4 divisors (see below), whose sum is σ = 118473570. Its totient is φ = 39491188.

The previous prime is 78982369. The next prime is 78982417. The reversal of 78982378 is 87328987.

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., 77387209 + 1595169 = 8797^2 + 1263^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19745593 + ... + 19745596.

Almost surely, 2^78982378 is an apocalyptic number.

78982378 is a deficient number, since it is larger than the sum of its proper divisors (39491192).

78982378 is a wasteful number, since it uses less digits than its factorization.

78982378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39491191.

The product of its digits is 1354752, while the sum is 52.

The square root of 78982378 is about 8887.2030470784. The cubic root of 78982378 is about 429.0521360305.

The spelling of 78982378 in words is "seventy-eight million, nine hundred eighty-two thousand, three hundred seventy-eight".