386139870 has 96 divisors (see below), whose sum is σ = 1109339712. Its totient is φ = 92691456.

The previous prime is 386139841. The next prime is 386139877. The reversal of 386139870 is 78931683.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386139877) 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, 29704 + ... + 40676.

It is an arithmetic number, because the mean of its divisors is an integer number (11555622).

Almost surely, 2^386139870 is an apocalyptic number.

386139870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 386139870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554669856).

386139870 is an abundant number, since it is smaller than the sum of its proper divisors (723199842).

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

386139870 is a wasteful number, since it uses less digits than its factorization.

386139870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11026 (or 11023 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 386139870 is about 19650.4419797622. The cubic root of 386139870 is about 728.1958764778.

The spelling of 386139870 in words is "three hundred eighty-six million, one hundred thirty-nine thousand, eight hundred seventy".