78055385 has 16 divisors (see below), whose sum is σ = 99522000. Its totient is φ = 58657536.

The previous prime is 78055301. The next prime is 78055409. The reversal of 78055385 is 58355087.

It can be written as a sum of positive squares in 8 ways, for example, as 9314704 + 68740681 = 3052^2 + 8291^2 .

It is a cyclic number.

It is not a de Polignac number, because 78055385 - 2¹⁴ = 78039001 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1910 + ... + 12639.

It is an arithmetic number, because the mean of its divisors is an integer number (6220125).

Almost surely, 2^78055385 is an apocalyptic number.

It is an amenable number.

78055385 is a deficient number, since it is larger than the sum of its proper divisors (21466615).

78055385 is a wasteful number, since it uses less digits than its factorization.

78055385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14620.

The product of its (nonzero) digits is 168000, while the sum is 41.

The square root of 78055385 is about 8834.8958680904. The cubic root of 78055385 is about 427.3669729617.

It can be divided in two parts, 780 and 55385, that added together give a palindrome (56165).

The spelling of 78055385 in words is "seventy-eight million, fifty-five thousand, three hundred eighty-five".