78343944 has 128 divisors (see below), whose sum is σ = 236544000. Its totient is φ = 21591360.

The previous prime is 78343943. The next prime is 78343981. The reversal of 78343944 is 44934387.

It is a super-2 number, since 2×78343944² = 12275547122950272, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 78343896 and 78343905.

It is not an unprimeable number, because it can be changed into a prime (78343943) 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 31 ways as a sum of consecutive naturals, for example, 255039 + ... + 255345.

It is an arithmetic number, because the mean of its divisors is an integer number (1848000).

Almost surely, 2^78343944 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 78343944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118272000).

78343944 is an abundant number, since it is smaller than the sum of its proper divisors (158200056).

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

78343944 is a wasteful number, since it uses less digits than its factorization.

78343944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 350 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 78343944 is about 8851.2114425089. The cubic root of 78343944 is about 427.8929624319.

The spelling of 78343944 in words is "seventy-eight million, three hundred forty-three thousand, nine hundred forty-four".