78354448 has 10 divisors (see below), whose sum is σ = 151811774. Its totient is φ = 39177216.

The previous prime is 78354427. The next prime is 78354449. The reversal of 78354448 is 84445387.

It can be written as a sum of positive squares in only one way, i.e., 73479184 + 4875264 = 8572^2 + 2208^2 .

It is a super-2 number, since 2×78354448² = 12278839042769408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78354449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2448561 + ... + 2448592.

Almost surely, 2^78354448 is an apocalyptic number.

It is an amenable number.

78354448 is a deficient number, since it is larger than the sum of its proper divisors (73457326).

78354448 is a wasteful number, since it uses less digits than its factorization.

78354448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4897161 (or 4897155 counting only the distinct ones).

The product of its digits is 430080, while the sum is 43.

The square root of 78354448 is about 8851.8047877255. The cubic root of 78354448 is about 427.9120848920.

The spelling of 78354448 in words is "seventy-eight million, three hundred fifty-four thousand, four hundred forty-eight".