386861740 has 48 divisors (see below), whose sum is σ = 843504480. Its totient is φ = 148861440.

The previous prime is 386861737. The next prime is 386861749. The reversal of 386861740 is 47168683.

It is not an unprimeable number, because it can be changed into a prime (386861749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180475 + ... + 182605.

It is an arithmetic number, because the mean of its divisors is an integer number (17573010).

Almost surely, 2^386861740 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 386861740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421752240).

386861740 is an abundant number, since it is smaller than the sum of its proper divisors (456642740).

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

386861740 is a wasteful number, since it uses less digits than its factorization.

386861740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 386861740 is about 19668.8011836004. The cubic root of 386861740 is about 728.6493697763.

The spelling of 386861740 in words is "three hundred eighty-six million, eight hundred sixty-one thousand, seven hundred forty".