386867740 has 144 divisors (see below), whose sum is σ = 1011225600. Its totient is φ = 123596928.

The previous prime is 386867737. The next prime is 386867749. The reversal of 386867740 is 47768683.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386867749) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1470849 + ... + 1471111.

It is an arithmetic number, because the mean of its divisors is an integer number (7022400).

Almost surely, 2^386867740 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 386867740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505612800).

386867740 is an abundant number, since it is smaller than the sum of its proper divisors (624357860).

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

386867740 is a wasteful number, since it uses less digits than its factorization.

386867740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 386867740 is about 19668.9537088275. The cubic root of 386867740 is about 728.6531367325.

The spelling of 386867740 in words is "three hundred eighty-six million, eight hundred sixty-seven thousand, seven hundred forty".