78329378 has 4 divisors (see below), whose sum is σ = 117494070. Its totient is φ = 39164688.

The previous prime is 78329371. The next prime is 78329417. The reversal of 78329378 is 87392387.

It is a happy number.

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., 77915929 + 413449 = 8827^2 + 643^2 .

It is a super-2 number, since 2×78329378² = 12270982915733768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78329371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19582343 + ... + 19582346.

Almost surely, 2^78329378 is an apocalyptic number.

78329378 is a deficient number, since it is larger than the sum of its proper divisors (39164692).

78329378 is a wasteful number, since it uses less digits than its factorization.

78329378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39164691.

The product of its digits is 508032, while the sum is 47.

The square root of 78329378 is about 8850.3885790399. The cubic root of 78329378 is about 427.8664423000.

The spelling of 78329378 in words is "seventy-eight million, three hundred twenty-nine thousand, three hundred seventy-eight".