386408280 has 128 divisors (see below), whose sum is σ = 1217617920. Its totient is φ = 97912320.

The previous prime is 386408251. The next prime is 386408293. The reversal of 386408280 is 82804683.

It is a super-2 number, since 2×386408280² = 298622717705116800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 526794 + ... + 527526.

It is an arithmetic number, because the mean of its divisors is an integer number (9512640).

Almost surely, 2^386408280 is an apocalyptic number.

386408280 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 386408280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608808960).

386408280 is an abundant number, since it is smaller than the sum of its proper divisors (831209640).

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

386408280 is a wasteful number, since it uses less digits than its factorization.

386408280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 386408280 is about 19657.2704107157. The cubic root of 386408280 is about 728.3645630085.

The spelling of 386408280 in words is "three hundred eighty-six million, four hundred eight thousand, two hundred eighty".