78973210 has 8 divisors (see below), whose sum is σ = 142151796. Its totient is φ = 31589280.

The previous prime is 78973199. The next prime is 78973231. The reversal of 78973210 is 1237987.

It can be written as a sum of positive squares in 2 ways, for example, as 76580001 + 2393209 = 8751^2 + 1547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78973210.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 3948651 + ... + 3948670.

Almost surely, 2^78973210 is an apocalyptic number.

78973210 is a deficient number, since it is larger than the sum of its proper divisors (63178586).

78973210 is a wasteful number, since it uses less digits than its factorization.

78973210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7897328.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 78973210 is about 8886.6872342848. The cubic root of 78973210 is about 429.0355344278.

The spelling of 78973210 in words is "seventy-eight million, nine hundred seventy-three thousand, two hundred ten".