78434744 has 8 divisors (see below), whose sum is σ = 147065160. Its totient is φ = 39217368.

The previous prime is 78434737. The next prime is 78434747. The reversal of 78434744 is 44743487.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78434747) 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 as a sum of consecutive naturals, namely, 4902164 + ... + 4902179.

It is an arithmetic number, because the mean of its divisors is an integer number (18383145).

Almost surely, 2^78434744 is an apocalyptic number.

It is an amenable number.

78434744 is a deficient number, since it is larger than the sum of its proper divisors (68630416).

78434744 is a wasteful number, since it uses less digits than its factorization.

78434744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9804349 (or 9804345 counting only the distinct ones).

The product of its digits is 301056, while the sum is 41.

The square root of 78434744 is about 8856.3391985628. The cubic root of 78434744 is about 428.0582067749.

The spelling of 78434744 in words is "seventy-eight million, four hundred thirty-four thousand, seven hundred forty-four".