387081686 has 16 divisors (see below), whose sum is σ = 599944320. Its totient is φ = 187112640.

The previous prime is 387081671. The next prime is 387081689. The reversal of 387081686 is 686180783.

It is a self number, because there is not a number n which added to its sum of digits gives 387081686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387081689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76730 + ... + 81618.

It is an arithmetic number, because the mean of its divisors is an integer number (37496520).

Almost surely, 2^387081686 is an apocalyptic number.

387081686 is a deficient number, since it is larger than the sum of its proper divisors (212862634).

387081686 is a wasteful number, since it uses less digits than its factorization.

387081686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 387081686 is about 19674.3916297303. The cubic root of 387081686 is about 728.7874321513.

The spelling of 387081686 in words is "three hundred eighty-seven million, eighty-one thousand, six hundred eighty-six".