380917728 has 120 divisors (see below), whose sum is σ = 1127899080. Its totient is φ = 126109440.

The previous prime is 380917727. The next prime is 380917729. The reversal of 380917728 is 827719083.

It is an interprime number because it is at equal distance from previous prime (380917727) and next prime (380917729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380917721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 463558 + ... + 464378.

It is an arithmetic number, because the mean of its divisors is an integer number (9399159).

Almost surely, 2^380917728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 380917728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (563949540).

380917728 is an abundant number, since it is smaller than the sum of its proper divisors (746981352).

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

380917728 is a wasteful number, since it uses less digits than its factorization.

380917728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 380917728 is about 19517.1137210398. The cubic root of 380917728 is about 724.8982674536.

The spelling of 380917728 in words is "three hundred eighty million, nine hundred seventeen thousand, seven hundred twenty-eight".