384280 has 32 divisors (see below), whose sum is σ = 932400. Its totient is φ = 141696.

The previous prime is 384277. The next prime is 384287. The reversal of 384280 is 82483.

384280 = 153² + 154² + ... + 167².

It is a super-2 number, since 2×384280² = 295342236800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151 + ... + 889.

2³⁸⁴²⁸⁰ 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 384280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (466200).

384280 is an abundant number, since it is smaller than the sum of its proper divisors (548120).

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

384280 is a wasteful number, since it uses less digits than its factorization.

384280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 384280 is about 619.9032182527. The cubic root of 384280 is about 72.7024858713.

The spelling of 384280 in words is "three hundred eighty-four thousand, two hundred eighty".