386956640 has 96 divisors (see below), whose sum is σ = 1067157504. Its totient is φ = 129830400.

The previous prime is 386956639. The next prime is 386956673. The reversal of 386956640 is 46659683.

It is a Harshad number since it is a multiple of its sum of digits (47).

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 15 ways as a sum of consecutive naturals, for example, 48965 + ... + 56315.

It is an arithmetic number, because the mean of its divisors is an integer number (11116224).

Almost surely, 2^386956640 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 386956640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (533578752).

386956640 is an abundant number, since it is smaller than the sum of its proper divisors (680200864).

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

386956640 is a wasteful number, since it uses less digits than its factorization.

386956640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7420 (or 7412 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The square root of 386956640 is about 19671.2134857004. The cubic root of 386956640 is about 728.7089459027.

The spelling of 386956640 in words is "three hundred eighty-six million, nine hundred fifty-six thousand, six hundred forty".