386489040 has 160 divisors (see below), whose sum is σ = 1375150080. Its totient is φ = 87962112.

The previous prime is 386489023. The next prime is 386489071. The reversal of 386489040 is 40984683.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 386488983 and 386489001.

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, 636417 + ... + 637023.

It is an arithmetic number, because the mean of its divisors is an integer number (8594688).

Almost surely, 2^386489040 is an apocalyptic number.

386489040 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 386489040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687575040).

386489040 is an abundant number, since it is smaller than the sum of its proper divisors (988661040).

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

386489040 is a wasteful number, since it uses less digits than its factorization.

386489040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 1003 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 386489040 is about 19659.3245051807. The cubic root of 386489040 is about 728.4153026256.

The spelling of 386489040 in words is "three hundred eighty-six million, four hundred eighty-nine thousand, forty".