78949456 has 10 divisors (see below), whose sum is σ = 152964602. Its totient is φ = 39474720.

The previous prime is 78949447. The next prime is 78949459. The reversal of 78949456 is 65494987.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66977856 + 11971600 = 8184^2 + 3460^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78949459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2467155 + ... + 2467186.

Almost surely, 2^78949456 is an apocalyptic number.

It is an amenable number.

78949456 is a deficient number, since it is larger than the sum of its proper divisors (74015146).

78949456 is a wasteful number, since it uses less digits than its factorization.

78949456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4934349 (or 4934343 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The square root of 78949456 is about 8885.3506402392. The cubic root of 78949456 is about 428.9925142185.

The spelling of 78949456 in words is "seventy-eight million, nine hundred forty-nine thousand, four hundred fifty-six".