387947772 has 24 divisors (see below), whose sum is σ = 1005790800. Its totient is φ = 129315888.

The previous prime is 387947771. The next prime is 387947779. The reversal of 387947772 is 277749783.

387947772 is a `hidden beast` number, since 38 + 79 + 477 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387947771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1795947 + ... + 1796162.

It is an arithmetic number, because the mean of its divisors is an integer number (41907950).

Almost surely, 2^387947772 is an apocalyptic number.

It is an amenable number.

387947772 is an abundant number, since it is smaller than the sum of its proper divisors (617843028).

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

387947772 is a wasteful number, since it uses less digits than its factorization.

387947772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592122 (or 3592114 counting only the distinct ones).

The product of its digits is 4148928, while the sum is 54.

The square root of 387947772 is about 19696.3898214876. The cubic root of 387947772 is about 729.3305754030.

The spelling of 387947772 in words is "three hundred eighty-seven million, nine hundred forty-seven thousand, seven hundred seventy-two".