78245881 has 8 divisors (see below), whose sum is σ = 89478464. Its totient is φ = 67026960.

The previous prime is 78245879. The next prime is 78245887. The reversal of 78245881 is 18854287.

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

It is not a de Polignac number, because 78245881 - 2¹ = 78245879 is a prime.

It is a super-3 number, since 3×78245881³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78245887) 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, 17071 + ... + 21163.

It is an arithmetic number, because the mean of its divisors is an integer number (11184808).

Almost surely, 2^78245881 is an apocalyptic number.

It is an amenable number.

78245881 is a deficient number, since it is larger than the sum of its proper divisors (11232583).

78245881 is a wasteful number, since it uses less digits than its factorization.

78245881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831.

The product of its digits is 143360, while the sum is 43.

The square root of 78245881 is about 8845.6701837679. The cubic root of 78245881 is about 427.7143568929.

The spelling of 78245881 in words is "seventy-eight million, two hundred forty-five thousand, eight hundred eighty-one".