78339106 has 4 divisors (see below), whose sum is σ = 117508662. Its totient is φ = 39169552.

The previous prime is 78339103. The next prime is 78339119. The reversal of 78339106 is 60193387.

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., 75533481 + 2805625 = 8691^2 + 1675^2 .

It is a super-2 number, since 2×78339106² = 12274031057758472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78339103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19584775 + ... + 19584778.

Almost surely, 2^78339106 is an apocalyptic number.

78339106 is a deficient number, since it is larger than the sum of its proper divisors (39169556).

78339106 is a wasteful number, since it uses less digits than its factorization.

78339106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39169555.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 78339106 is about 8850.9381423666. The cubic root of 78339106 is about 427.8841543111.

The spelling of 78339106 in words is "seventy-eight million, three hundred thirty-nine thousand, one hundred six".