78394107 has 16 divisors (see below), whose sum is σ = 114186240. Its totient is φ = 47445600.

The previous prime is 78394061. The next prime is 78394109. The reversal of 78394107 is 70149387.

It is not a de Polignac number, because 78394107 - 2¹⁹ = 77869819 is a prime.

It is a super-2 number, since 2×78394107² = 12291272024654898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78394109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33894 + ... + 36132.

It is an arithmetic number, because the mean of its divisors is an integer number (7136640).

Almost surely, 2^78394107 is an apocalyptic number.

78394107 is a deficient number, since it is larger than the sum of its proper divisors (35792133).

78394107 is a wasteful number, since it uses less digits than its factorization.

78394107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 78394107 is about 8854.0446689634. The cubic root of 78394107 is about 427.9842684263.

The spelling of 78394107 in words is "seventy-eight million, three hundred ninety-four thousand, one hundred seven".