78736845 has 32 divisors (see below), whose sum is σ = 137871360. Its totient is φ = 38053440.

The previous prime is 78736829. The next prime is 78736849. The reversal of 78736845 is 54863787.

It is not a de Polignac number, because 78736845 - 2⁴ = 78736829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78736794 and 78736803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78736849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71892 + ... + 72978.

It is an arithmetic number, because the mean of its divisors is an integer number (4308480).

Almost surely, 2^78736845 is an apocalyptic number.

It is an amenable number.

78736845 is a deficient number, since it is larger than the sum of its proper divisors (59134515).

78736845 is a wasteful number, since it uses less digits than its factorization.

78736845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545.

The product of its digits is 1128960, while the sum is 48.

The square root of 78736845 is about 8873.3784434115. The cubic root of 78736845 is about 428.6070755270.

The spelling of 78736845 in words is "seventy-eight million, seven hundred thirty-six thousand, eight hundred forty-five".