78442048 has 14 divisors (see below), whose sum is σ = 155658566. Its totient is φ = 39220992.

The previous prime is 78442043. The next prime is 78442079. The reversal of 78442048 is 84024487.

It can be written as a sum of positive squares in only one way, i.e., 77580864 + 861184 = 8808^2 + 928^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78441998 and 78442016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78442043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612765 + ... + 612892.

It is an arithmetic number, because the mean of its divisors is an integer number (11118469).

Almost surely, 2^78442048 is an apocalyptic number.

It is an amenable number.

78442048 is a deficient number, since it is larger than the sum of its proper divisors (77216518).

78442048 is a wasteful number, since it uses less digits than its factorization.

78442048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225669 (or 1225659 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 78442048 is about 8856.7515489597. The cubic root of 78442048 is about 428.0714935742.

The spelling of 78442048 in words is "seventy-eight million, four hundred forty-two thousand, forty-eight".