78455487 has 16 divisors (see below), whose sum is σ = 115251840. Its totient is φ = 47076000.

The previous prime is 78455483. The next prime is 78455491.

78455487 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (78455483) and next prime (78455491).

It is not a de Polignac number, because 78455487 - 2² = 78455483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78455483) 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, 8437 + ... + 15102.

It is an arithmetic number, because the mean of its divisors is an integer number (7203240).

Almost surely, 2^78455487 is an apocalyptic number.

78455487 is a deficient number, since it is larger than the sum of its proper divisors (36796353).

78455487 is a wasteful number, since it uses less digits than its factorization.

78455487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23654.

The product of its digits is 1254400, while the sum is 48.

The square root of 78455487 is about 8857.5102032117. The cubic root of 78455487 is about 428.0959384752.

The spelling of 78455487 in words is "seventy-eight million, four hundred fifty-five thousand, four hundred eighty-seven".