387147816 has 128 divisors (see below), whose sum is σ = 1183334400. Its totient is φ = 116303040.

The previous prime is 387147779. The next prime is 387147821. The reversal of 387147816 is 618741783.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301111 + ... + 302393.

It is an arithmetic number, because the mean of its divisors is an integer number (9244800).

Almost surely, 2^387147816 is an apocalyptic number.

387147816 is a gapful number since it is divisible by the number (36) 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 387147816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591667200).

387147816 is an abundant number, since it is smaller than the sum of its proper divisors (796186584).

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

387147816 is a wasteful number, since it uses less digits than its factorization.

387147816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436 (or 1426 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 387147816 is about 19676.0721690077. The cubic root of 387147816 is about 728.8289324085.

The spelling of 387147816 in words is "three hundred eighty-seven million, one hundred forty-seven thousand, eight hundred sixteen".