78280214 has 4 divisors (see below), whose sum is σ = 117420324. Its totient is φ = 39140106.

The previous prime is 78280211. The next prime is 78280259. The reversal of 78280214 is 41208287.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×78280214² = 12255583807771592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78280211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19570052 + ... + 19570055.

It is an arithmetic number, because the mean of its divisors is an integer number (29355081).

Almost surely, 2^78280214 is an apocalyptic number.

78280214 is a deficient number, since it is larger than the sum of its proper divisors (39140110).

78280214 is a wasteful number, since it uses less digits than its factorization.

78280214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39140109.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 78280214 is about 8847.6106379067. The cubic root of 78280214 is about 427.7769057434.

The spelling of 78280214 in words is "seventy-eight million, two hundred eighty thousand, two hundred fourteen".