78152285 has 32 divisors (see below), whose sum is σ = 100172160. Its totient is φ = 58464000.

The previous prime is 78152279. The next prime is 78152287. The reversal of 78152285 is 58225187.

It is a happy number.

It is not a de Polignac number, because 78152285 - 2²⁰ = 77103709 is a prime.

It is a super-2 number, since 2×78152285² = 12215559301442450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78152287) 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, 773735 + ... + 773835.

It is an arithmetic number, because the mean of its divisors is an integer number (3130380).

Almost surely, 2^78152285 is an apocalyptic number.

It is an amenable number.

78152285 is a deficient number, since it is larger than the sum of its proper divisors (22019875).

78152285 is a wasteful number, since it uses less digits than its factorization.

78152285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269.

The product of its digits is 44800, while the sum is 38.

The square root of 78152285 is about 8840.3781027737. The cubic root of 78152285 is about 427.5437480166.

The spelling of 78152285 in words is "seventy-eight million, one hundred fifty-two thousand, two hundred eighty-five".