78921704 has 32 divisors (see below), whose sum is σ = 151286400. Its totient is φ = 38586240.

The previous prime is 78921677. The next prime is 78921709. The reversal of 78921704 is 40712987.

It is not an unprimeable number, because it can be changed into a prime (78921709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127604 + ... + 128220.

It is an arithmetic number, because the mean of its divisors is an integer number (4727700).

Almost surely, 2^78921704 is an apocalyptic number.

It is an amenable number.

78921704 is a deficient number, since it is larger than the sum of its proper divisors (72364696).

78921704 is a wasteful number, since it uses less digits than its factorization.

78921704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 78921704 is about 8883.7888313489. The cubic root of 78921704 is about 428.9422424113.

The spelling of 78921704 in words is "seventy-eight million, nine hundred twenty-one thousand, seven hundred four".