3978154089 has 48 divisors (see below), whose sum is σ = 7444528000. Its totient is φ = 1987918848.

The previous prime is 3978154079. The next prime is 3978154091. The reversal of 3978154089 is 9804518793.

3978154089 is a `hidden beast` number, since 3 + 97 + 8 + 1 + 540 + 8 + 9 = 666.

It is not a de Polignac number, because 3978154089 - 2⁵ = 3978154057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3978154079) 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 47 ways as a sum of consecutive naturals, for example, 112264 + ... + 143385.

Almost surely, 2^3978154089 is an apocalyptic number.

3978154089 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3978154089 is a deficient number, since it is larger than the sum of its proper divisors (3466373911).

3978154089 is a wasteful number, since it uses less digits than its factorization.

3978154089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255694 (or 255691 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 3978154089 is about 63072.6096574416. The cubic root of 3978154089 is about 1584.5059231516.

The spelling of 3978154089 in words is "three billion, nine hundred seventy-eight million, one hundred fifty-four thousand, eighty-nine".