383979816 has 288 divisors, whose sum is σ = 1283817600. Its totient is φ = 102435840.

The previous prime is 383979727. The next prime is 383979823. The reversal of 383979816 is 618979383.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4860465 + ... + 4860543.

It is an arithmetic number, because the mean of its divisors is an integer number (4457700).

Almost surely, 2^383979816 is an apocalyptic number.

383979816 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 383979816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (641908800).

383979816 is an abundant number, since it is smaller than the sum of its proper divisors (899837784).

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

383979816 is a wasteful number, since it uses less digits than its factorization.

383979816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 131 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 383979816 is about 19595.4029302793. The cubic root of 383979816 is about 726.8355019229.

The spelling of 383979816 in words is "three hundred eighty-three million, nine hundred seventy-nine thousand, eight hundred sixteen".