78173344 has 72 divisors (see below), whose sum is σ = 167106240. Its totient is φ = 35982336.

The previous prime is 78173281. The next prime is 78173363. The reversal of 78173344 is 44337187.

It is a super-2 number, since 2×78173344² = 12222143424284672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 730539 + ... + 730645.

It is an arithmetic number, because the mean of its divisors is an integer number (2320920).

Almost surely, 2^78173344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78173344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83553120).

78173344 is an abundant number, since it is smaller than the sum of its proper divisors (88932896).

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

78173344 is a wasteful number, since it uses less digits than its factorization.

78173344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 205 counting only the distinct ones).

The product of its digits is 56448, while the sum is 37.

The square root of 78173344 is about 8841.5690915131. The cubic root of 78173344 is about 427.5821467027.

The spelling of 78173344 in words is "seventy-eight million, one hundred seventy-three thousand, three hundred forty-four".