78120383 has 8 divisors (see below), whose sum is σ = 85928016. Its totient is φ = 71017320.

The previous prime is 78120359. The next prime is 78120437. The reversal of 78120383 is 38302187.

It is not a de Polignac number, because 78120383 - 2²⁰ = 77071807 is a prime.

It is a super-2 number, since 2×78120383² = 12205588480133378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78120313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28016 + ... + 30677.

It is an arithmetic number, because the mean of its divisors is an integer number (10741002).

Almost surely, 2^78120383 is an apocalyptic number.

78120383 is a deficient number, since it is larger than the sum of its proper divisors (7807633).

78120383 is an equidigital number, since it uses as much as digits as its factorization.

78120383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58726 (or 58704 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 78120383 is about 8838.5735840123. The cubic root of 78120383 is about 427.4855652137.

The spelling of 78120383 in words is "seventy-eight million, one hundred twenty thousand, three hundred eighty-three".