387771471978 has 16 divisors (see below), whose sum is σ = 846046848096. Its totient is φ = 117506506640.

The previous prime is 387771471973. The next prime is 387771472031. The reversal of 387771471978 is 879174177783.

It is not an unprimeable number, because it can be changed into a prime (387771471973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2937662601 + ... + 2937662732.

It is an arithmetic number, because the mean of its divisors is an integer number (52877928006).

Almost surely, 2^387771471978 is an apocalyptic number.

387771471978 is an abundant number, since it is smaller than the sum of its proper divisors (458275376118).

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

387771471978 is a wasteful number, since it uses less digits than its factorization.

387771471978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5875325349.

The product of its digits is 116169984, while the sum is 69.

The spelling of 387771471978 in words is "three hundred eighty-seven billion, seven hundred seventy-one million, four hundred seventy-one thousand, nine hundred seventy-eight".