78907970 has 8 divisors (see below), whose sum is σ = 142034364. Its totient is φ = 31563184.

The previous prime is 78907949. The next prime is 78907973. The reversal of 78907970 is 7970987.

It can be written as a sum of positive squares in 2 ways, for example, as 73085401 + 5822569 = 8549^2 + 2413^2 .

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

It is not an unprimeable number, because it can be changed into a prime (78907973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3945389 + ... + 3945408.

Almost surely, 2^78907970 is an apocalyptic number.

78907970 is a deficient number, since it is larger than the sum of its proper divisors (63126394).

78907970 is a wasteful number, since it uses less digits than its factorization.

78907970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7890804.

The product of its (nonzero) digits is 222264, while the sum is 47.

The square root of 78907970 is about 8883.0158167145. The cubic root of 78907970 is about 428.9173593765.

The spelling of 78907970 in words is "seventy-eight million, nine hundred seven thousand, nine hundred seventy".