78049944 has 72 divisors (see below), whose sum is σ = 245908260. Its totient is φ = 22298976.

The previous prime is 78049943. The next prime is 78049949. The reversal of 78049944 is 44994087.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 78049944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78049943) 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 17 ways as a sum of consecutive naturals, for example, 7534 + ... + 14589.

Almost surely, 2^78049944 is an apocalyptic number.

It is an amenable number.

78049944 is an abundant number, since it is smaller than the sum of its proper divisors (167858316).

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

78049944 is a wasteful number, since it uses less digits than its factorization.

78049944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22149 (or 22135 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 78049944 is about 8834.5879360613. The cubic root of 78049944 is about 427.3570425867.

The spelling of 78049944 in words is "seventy-eight million, forty-nine thousand, nine hundred forty-four".