78970312 has 8 divisors (see below), whose sum is σ = 148069350. Its totient is φ = 39485152.

The previous prime is 78970303. The next prime is 78970313. The reversal of 78970312 is 21307987.

It can be written as a sum of positive squares in only one way, i.e., 72488196 + 6482116 = 8514^2 + 2546^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (78970313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4935637 + ... + 4935652.

Almost surely, 2^78970312 is an apocalyptic number.

It is an amenable number.

78970312 is a deficient number, since it is larger than the sum of its proper divisors (69099038).

78970312 is a wasteful number, since it uses less digits than its factorization.

78970312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9871295 (or 9871291 counting only the distinct ones).

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

The square root of 78970312 is about 8886.5241799030. The cubic root of 78970312 is about 429.0302864026.

The spelling of 78970312 in words is "seventy-eight million, nine hundred seventy thousand, three hundred twelve".