78108849 has 48 divisors (see below), whose sum is σ = 139764352. Its totient is φ = 40932864.

The previous prime is 78108839. The next prime is 78108857. The reversal of 78108849 is 94880187.

It is not a de Polignac number, because 78108849 - 2⁵ = 78108817 is a prime.

It is a super-3 number, since 3×78108849³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (78108839) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 231609 + ... + 231945.

Almost surely, 2^78108849 is an apocalyptic number.

It is an amenable number.

78108849 is a deficient number, since it is larger than the sum of its proper divisors (61655503).

78108849 is a wasteful number, since it uses less digits than its factorization.

78108849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 78108849 is about 8837.9210790774. The cubic root of 78108849 is about 427.4645256293.

The spelling of 78108849 in words is "seventy-eight million, one hundred eight thousand, eight hundred forty-nine".