78178076 has 12 divisors (see below), whose sum is σ = 137114208. Its totient is φ = 39002592.

The previous prime is 78178073. The next prime is 78178097. The reversal of 78178076 is 67087187.

78178076 = 164² + 165² + ... + 620².

It is a super-2 number, since 2×78178076² = 12223623134123552, which contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78178073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19556 + ... + 23211.

It is an arithmetic number, because the mean of its divisors is an integer number (11426184).

Almost surely, 2^78178076 is an apocalyptic number.

It is an amenable number.

78178076 is a deficient number, since it is larger than the sum of its proper divisors (58936132).

78178076 is a wasteful number, since it uses less digits than its factorization.

78178076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43228 (or 43226 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 44.

The square root of 78178076 is about 8841.8366870238. The cubic root of 78178076 is about 427.5907740165.

The spelling of 78178076 in words is "seventy-eight million, one hundred seventy-eight thousand, seventy-six".