387146780 has 24 divisors (see below), whose sum is σ = 860833008. Its totient is φ = 145749248.

The previous prime is 387146761. The next prime is 387146803. The reversal of 387146780 is 87641783.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 568994 + ... + 569673.

It is an arithmetic number, because the mean of its divisors is an integer number (35868042).

Almost surely, 2^387146780 is an apocalyptic number.

It is an amenable number.

387146780 is an abundant number, since it is smaller than the sum of its proper divisors (473686228).

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

387146780 is a wasteful number, since it uses less digits than its factorization.

387146780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138693 (or 1138691 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 387146780 is about 19676.0458425975. The cubic root of 387146780 is about 728.8282822973.

The spelling of 387146780 in words is "three hundred eighty-seven million, one hundred forty-six thousand, seven hundred eighty".