387271784640 has 448 divisors, whose sum is σ = 1384195018752. Its totient is φ = 91022131200.

The previous prime is 387271784629. The next prime is 387271784651. The reversal of 387271784640 is 46487172783.

It is an interprime number because it is at equal distance from previous prime (387271784629) and next prime (387271784651).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 261492700 + ... + 261494180.

It is an arithmetic number, because the mean of its divisors is an integer number (3089721024).

Almost surely, 2^387271784640 is an apocalyptic number.

387271784640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387271784640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (692097509376).

387271784640 is an abundant number, since it is smaller than the sum of its proper divisors (996923234112).

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

387271784640 is a wasteful number, since it uses less digits than its factorization.

387271784640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 57.

The spelling of 387271784640 in words is "three hundred eighty-seven billion, two hundred seventy-one million, seven hundred eighty-four thousand, six hundred forty".