78023985 has 16 divisors (see below), whose sum is σ = 134441664. Its totient is φ = 38411712.

The previous prime is 78023977. The next prime is 78023989. The reversal of 78023985 is 58932087.

It is not a de Polignac number, because 78023985 - 2³ = 78023977 is a prime.

78023985 is a modest number, since divided by 23985 gives 780 as remainder.

It is not an unprimeable number, because it can be changed into a prime (78023989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199867 + ... + 200256.

It is an arithmetic number, because the mean of its divisors is an integer number (8402604).

Almost surely, 2^78023985 is an apocalyptic number.

It is an amenable number.

78023985 is a deficient number, since it is larger than the sum of its proper divisors (56417679).

78023985 is a wasteful number, since it uses less digits than its factorization.

78023985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400144.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 78023985 is about 8833.1186451898. The cubic root of 78023985 is about 427.3096584331.

The spelling of 78023985 in words is "seventy-eight million, twenty-three thousand, nine hundred eighty-five".