78188103 has 12 divisors (see below), whose sum is σ = 129072528. Its totient is φ = 44678880.

The previous prime is 78188087. The next prime is 78188113. The reversal of 78188103 is 30188187.

It is not a de Polignac number, because 78188103 - 2⁴ = 78188087 is a prime.

It is a super-2 number, since 2×78188103² = 12226758901477218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78188113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 620478 + ... + 620603.

It is an arithmetic number, because the mean of its divisors is an integer number (10756044).

Almost surely, 2^78188103 is an apocalyptic number.

78188103 is a deficient number, since it is larger than the sum of its proper divisors (50884425).

78188103 is a wasteful number, since it uses less digits than its factorization.

78188103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241094 (or 1241091 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 78188103 is about 8842.4036890429. The cubic root of 78188103 is about 427.6090539471.

The spelling of 78188103 in words is "seventy-eight million, one hundred eighty-eight thousand, one hundred three".