78806470 has 16 divisors (see below), whose sum is σ = 142421328. Its totient is φ = 31396000.

The previous prime is 78806461. The next prime is 78806479. The reversal of 78806470 is 7460887.

It is an interprime number because it is at equal distance from previous prime (78806461) and next prime (78806479).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78806479) 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, 13189 + ... + 18208.

It is an arithmetic number, because the mean of its divisors is an integer number (8901333).

Almost surely, 2^78806470 is an apocalyptic number.

78806470 is a deficient number, since it is larger than the sum of its proper divisors (63614858).

78806470 is a wasteful number, since it uses less digits than its factorization.

78806470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31655.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 78806470 is about 8877.3008285176. The cubic root of 78806470 is about 428.7333737713.

The spelling of 78806470 in words is "seventy-eight million, eight hundred six thousand, four hundred seventy".