78220467 has 18 divisors (see below), whose sum is σ = 122347212. Its totient is φ = 48134736.

The previous prime is 78220459. The next prime is 78220469. The reversal of 78220467 is 76402287.

It is not a de Polignac number, because 78220467 - 2³ = 78220459 is a prime.

It is a super-2 number, since 2×78220467² = 12236882915396178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78220469) 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 in 17 ways as a sum of consecutive naturals, for example, 24193 + ... + 27234.

Almost surely, 2^78220467 is an apocalyptic number.

78220467 is a deficient number, since it is larger than the sum of its proper divisors (44126745).

78220467 is a wasteful number, since it uses less digits than its factorization.

78220467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51459 (or 51443 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 78220467 is about 8844.2335450846. The cubic root of 78220467 is about 427.6680451485.

It can be divided in two parts, 78220 and 467, that added together give a palindrome (78687).

The spelling of 78220467 in words is "seventy-eight million, two hundred twenty thousand, four hundred sixty-seven".