78531485 has 8 divisors (see below), whose sum is σ = 94643640. Its totient is φ = 62554624.

The previous prime is 78531413. The next prime is 78531511. The reversal of 78531485 is 58413587.

It can be written as a sum of positive squares in 4 ways, for example, as 4519876 + 74011609 = 2126^2 + 8603^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78531485 - 2¹⁰ = 78530461 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32540 + ... + 34869.

It is an arithmetic number, because the mean of its divisors is an integer number (11830455).

Almost surely, 2^78531485 is an apocalyptic number.

It is an amenable number.

78531485 is a deficient number, since it is larger than the sum of its proper divisors (16112155).

78531485 is a wasteful number, since it uses less digits than its factorization.

78531485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67647.

The product of its digits is 134400, while the sum is 41.

The square root of 78531485 is about 8861.7991965515. The cubic root of 78531485 is about 428.2341227158.

The spelling of 78531485 in words is "seventy-eight million, five hundred thirty-one thousand, four hundred eighty-five".