78541236 has 36 divisors (see below), whose sum is σ = 200509764. Its totient is φ = 25920000.

The previous prime is 78541217. The next prime is 78541237. The reversal of 78541236 is 63214587.

It can be written as a sum of positive squares in 2 ways, for example, as 73205136 + 5336100 = 8556^2 + 2310^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 78541236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78541237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7165 + ... + 14436.

Almost surely, 2^78541236 is an apocalyptic number.

It is an amenable number.

78541236 is an abundant number, since it is smaller than the sum of its proper divisors (121968528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78541236 is a wasteful number, since it uses less digits than its factorization.

78541236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21712 (or 21707 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 78541236 is about 8862.3493499185. The cubic root of 78541236 is about 428.2518461300.

The spelling of 78541236 in words is "seventy-eight million, five hundred forty-one thousand, two hundred thirty-six".