386149878 has 24 divisors (see below), whose sum is σ = 838539000. Its totient is φ = 128427264.

The previous prime is 386149873. The next prime is 386149903. The reversal of 386149878 is 878941683.

386149878 is a `hidden beast` number, since 3 + 86 + 1 + 498 + 78 = 666.

386149878 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×386149878² = 298223456558829768, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386149873) 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, 15808 + ... + 31971.

It is an arithmetic number, because the mean of its divisors is an integer number (34939125).

Almost surely, 2^386149878 is an apocalyptic number.

386149878 is an abundant number, since it is smaller than the sum of its proper divisors (452389122).

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

386149878 is a wasteful number, since it uses less digits than its factorization.

386149878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48236 (or 48233 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 386149878 is about 19650.6966288730. The cubic root of 386149878 is about 728.2021675673.

The spelling of 386149878 in words is "three hundred eighty-six million, one hundred forty-nine thousand, eight hundred seventy-eight".