78254536 has 16 divisors (see below), whose sum is σ = 155358540. Its totient is φ = 36825600.

The previous prime is 78254531. The next prime is 78254543. The reversal of 78254536 is 63545287.

It can be written as a sum of positive squares in 2 ways, for example, as 67404100 + 10850436 = 8210^2 + 3294^2 .

It is a super-2 number, since 2×78254536² = 12247544809150592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78254531) 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, 287565 + ... + 287836.

Almost surely, 2^78254536 is an apocalyptic number.

It is an amenable number.

78254536 is a deficient number, since it is larger than the sum of its proper divisors (77104004).

78254536 is a wasteful number, since it uses less digits than its factorization.

78254536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575424 (or 575420 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 78254536 is about 8846.1593926404. The cubic root of 78254536 is about 427.7301265463.

The spelling of 78254536 in words is "seventy-eight million, two hundred fifty-four thousand, five hundred thirty-six".