78670000 has 50 divisors (see below), whose sum is σ = 190492148. Its totient is φ = 31464000.

The previous prime is 78669991. The next prime is 78670001. The reversal of 78670000 is 7687.

It is a tau number, because it is divible by the number of its divisors (50).

It is not an unprimeable number, because it can be changed into a prime (78670001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6067 + ... + 13933.

Almost surely, 2^78670000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78670000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95246074).

78670000 is an abundant number, since it is smaller than the sum of its proper divisors (111822148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78670000 is an equidigital number, since it uses as much as digits as its factorization.

78670000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7895 (or 7874 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 78670000 is about 8869.6110399498. The cubic root of 78670000 is about 428.4857500684.

Adding to 78670000 its reverse (7687), we get a palindrome (78677687).

The spelling of 78670000 in words is "seventy-eight million, six hundred seventy thousand".