78578236 has 12 divisors (see below), whose sum is σ = 150013080. Its totient is φ = 35717360.

The previous prime is 78578221. The next prime is 78578237. The reversal of 78578236 is 63287587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78578237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892891 + ... + 892978.

It is an arithmetic number, because the mean of its divisors is an integer number (12501090).

Almost surely, 2^78578236 is an apocalyptic number.

It is an amenable number.

78578236 is a deficient number, since it is larger than the sum of its proper divisors (71434844).

78578236 is a wasteful number, since it uses less digits than its factorization.

78578236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785884 (or 1785882 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 78578236 is about 8864.4365867211. The cubic root of 78578236 is about 428.3190839767.

The spelling of 78578236 in words is "seventy-eight million, five hundred seventy-eight thousand, two hundred thirty-six".