78470889 has 16 divisors (see below), whose sum is σ = 123432960. Its totient is φ = 43393680.

The previous prime is 78470881. The next prime is 78470891. The reversal of 78470889 is 98807487.

It is not a de Polignac number, because 78470889 - 2³ = 78470881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78470881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59619 + ... + 60920.

It is an arithmetic number, because the mean of its divisors is an integer number (7714560).

Almost surely, 2^78470889 is an apocalyptic number.

It is an amenable number.

78470889 is a deficient number, since it is larger than the sum of its proper divisors (44962071).

78470889 is a wasteful number, since it uses less digits than its factorization.

78470889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120580.

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 78470889 is about 8858.3795922279. The cubic root of 78470889 is about 428.1239505471.

The spelling of 78470889 in words is "seventy-eight million, four hundred seventy thousand, eight hundred eighty-nine".