78468129 has 32 divisors (see below), whose sum is σ = 118765440. Its totient is φ = 51195456.

The previous prime is 78468127. The next prime is 78468139. The reversal of 78468129 is 92186487.

It is not a de Polignac number, because 78468129 - 2¹ = 78468127 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78468127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 453487 + ... + 453659.

It is an arithmetic number, because the mean of its divisors is an integer number (3711420).

Almost surely, 2^78468129 is an apocalyptic number.

It is an amenable number.

78468129 is a deficient number, since it is larger than the sum of its proper divisors (40297311).

78468129 is a wasteful number, since it uses less digits than its factorization.

78468129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 440 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 78468129 is about 8858.2238061589. The cubic root of 78468129 is about 428.1189311232.

The spelling of 78468129 in words is "seventy-eight million, four hundred sixty-eight thousand, one hundred twenty-nine".