387972766 has 16 divisors (see below), whose sum is σ = 588409920. Its totient is φ = 191847040.

The previous prime is 387972757. The next prime is 387972797. The reversal of 387972766 is 667279783.

It is a super-3 number, since 3×387972766³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74475 + ... + 79513.

It is an arithmetic number, because the mean of its divisors is an integer number (36775620).

Almost surely, 2^387972766 is an apocalyptic number.

387972766 is a deficient number, since it is larger than the sum of its proper divisors (200437154).

387972766 is a wasteful number, since it uses less digits than its factorization.

387972766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5459.

The product of its digits is 5334336, while the sum is 55.

The square root of 387972766 is about 19697.0242930246. The cubic root of 387972766 is about 729.3462377321.

The spelling of 387972766 in words is "three hundred eighty-seven million, nine hundred seventy-two thousand, seven hundred sixty-six".