78173088 has 48 divisors (see below), whose sum is σ = 234521280. Its totient is φ = 22334976.

The previous prime is 78173047. The next prime is 78173093. The reversal of 78173088 is 88037187.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×78173088² = 12222063374911488, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57493 + ... + 58836.

It is an arithmetic number, because the mean of its divisors is an integer number (4885860).

Almost surely, 2^78173088 is an apocalyptic number.

It is an amenable number.

78173088 is an abundant number, since it is smaller than the sum of its proper divisors (156348192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78173088 is a wasteful number, since it uses less digits than its factorization.

78173088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116349 (or 116341 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 78173088 is about 8841.5546144329. The cubic root of 78173088 is about 427.5816799573.

It can be divided in two parts, 78 and 173088, that added together give a triangular number (173166 = T₅₈₈).

The spelling of 78173088 in words is "seventy-eight million, one hundred seventy-three thousand, eighty-eight".