78485407 has 48 divisors (see below), whose sum is σ = 112154112. Its totient is φ = 53887680.

The previous prime is 78485389. The next prime is 78485417. The reversal of 78485407 is 70458487.

It is a de Polignac number, because none of the positive numbers 2^k-78485407 is a prime.

It is a super-2 number, since 2×78485407² = 12319918223911298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78485417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 160918 + ... + 161404.

It is an arithmetic number, because the mean of its divisors is an integer number (2336544).

Almost surely, 2^78485407 is an apocalyptic number.

78485407 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78485407 is a deficient number, since it is larger than the sum of its proper divisors (33668705).

78485407 is a wasteful number, since it uses less digits than its factorization.

78485407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 78485407 is about 8859.1990044247. The cubic root of 78485407 is about 428.1503515064.

It can be divided in two parts, 7 and 8485407, that multiplied together give a square (59397849 = 7707²).

The spelling of 78485407 in words is "seventy-eight million, four hundred eighty-five thousand, four hundred seven".