78647650 has 24 divisors (see below), whose sum is σ = 153985680. Its totient is φ = 29802960.

The previous prime is 78647641. The next prime is 78647677. The reversal of 78647650 is 5674687.

It is a junction number, because it is equal to n+sod(n) for n = 78647597 and 78647606.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40444 + ... + 42343.

It is an arithmetic number, because the mean of its divisors is an integer number (6416070).

Almost surely, 2^78647650 is an apocalyptic number.

78647650 is a deficient number, since it is larger than the sum of its proper divisors (75338030).

78647650 is a wasteful number, since it uses less digits than its factorization.

78647650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82818 (or 82813 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 78647650 is about 8868.3510304904. The cubic root of 78647650 is about 428.4451688915.

It can be divided in two parts, 78647 and 650, that added together give a palindrome (79297).

The spelling of 78647650 in words is "seventy-eight million, six hundred forty-seven thousand, six hundred fifty".