386120640 has 112 divisors (see below), whose sum is σ = 1235976192. Its totient is φ = 102122496.

The previous prime is 386120639. The next prime is 386120653. The reversal of 386120640 is 46021683.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 386120598 and 386120607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120337 + ... + 123503.

Almost surely, 2^386120640 is an apocalyptic number.

386120640 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 386120640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (617988096).

386120640 is an abundant number, since it is smaller than the sum of its proper divisors (849855552).

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

386120640 is a wasteful number, since it uses less digits than its factorization.

386120640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3314 (or 3304 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 386120640 is about 19649.9526716987. The cubic root of 386120640 is about 728.1837880782.

It can be divided in two parts, 386120 and 640, that added together give a triangular number (386760 = T₈₇₉).

The spelling of 386120640 in words is "three hundred eighty-six million, one hundred twenty thousand, six hundred forty".