78368237 has 12 divisors (see below), whose sum is σ = 82299420. Its totient is φ = 74535552.

The previous prime is 78368219. The next prime is 78368263. The reversal of 78368237 is 73286387.

It can be written as a sum of positive squares in 2 ways, for example, as 23222761 + 55145476 = 4819^2 + 7426^2 .

It is not a de Polignac number, because 78368237 - 2¹² = 78364141 is a prime.

It is a super-2 number, since 2×78368237² = 12283161140976338, 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 (78368207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180773 + ... + 181205.

It is an arithmetic number, because the mean of its divisors is an integer number (6858285).

Almost surely, 2^78368237 is an apocalyptic number.

It is an amenable number.

78368237 is a deficient number, since it is larger than the sum of its proper divisors (3931183).

78368237 is an equidigital number, since it uses as much as digits as its factorization.

78368237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 541 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 78368237 is about 8852.5836341714. The cubic root of 78368237 is about 427.9371850779.

The spelling of 78368237 in words is "seventy-eight million, three hundred sixty-eight thousand, two hundred thirty-seven".