78982281 has 24 divisors (see below), whose sum is σ = 131349504. Its totient is φ = 44798400.

The previous prime is 78982279. The next prime is 78982291. The reversal of 78982281 is 18228987.

It is a happy number.

It is not a de Polignac number, because 78982281 - 2¹ = 78982279 is a prime.

It is a super-2 number, since 2×78982281² = 12476401423925922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78982201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4056 + ... + 13206.

It is an arithmetic number, because the mean of its divisors is an integer number (5472896).

Almost surely, 2^78982281 is an apocalyptic number.

It is an amenable number.

78982281 is a deficient number, since it is larger than the sum of its proper divisors (52367223).

78982281 is a wasteful number, since it uses less digits than its factorization.

78982281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9301 (or 9298 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 78982281 is about 8887.1975897917. The cubic root of 78982281 is about 429.0519603877.

The spelling of 78982281 in words is "seventy-eight million, nine hundred eighty-two thousand, two hundred eighty-one".