387540686 has 16 divisors (see below), whose sum is σ = 636292608. Its totient is φ = 175932000.

The previous prime is 387540683. The next prime is 387540689. The reversal of 387540686 is 686045783.

It is an interprime number because it is at equal distance from previous prime (387540683) and next prime (387540689).

It is a super-3 number, since 3×387540686³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 387540686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387540683) 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, 120590 + ... + 123761.

It is an arithmetic number, because the mean of its divisors is an integer number (39768288).

Almost surely, 2^387540686 is an apocalyptic number.

387540686 is a deficient number, since it is larger than the sum of its proper divisors (248751922).

387540686 is a wasteful number, since it uses less digits than its factorization.

387540686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244427.

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 387540686 is about 19686.0530833380. The cubic root of 387540686 is about 729.0753828251.

The spelling of 387540686 in words is "three hundred eighty-seven million, five hundred forty thousand, six hundred eighty-six".