387806972 has 36 divisors (see below), whose sum is σ = 790690320. Its totient is φ = 165945024.

The previous prime is 387806963. The next prime is 387806983. The reversal of 387806972 is 279608783.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 387806972.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 179048 + ... + 181200.

It is an arithmetic number, because the mean of its divisors is an integer number (21963620).

Almost surely, 2^387806972 is an apocalyptic number.

It is an amenable number.

387806972 is an abundant number, since it is smaller than the sum of its proper divisors (402883348).

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

387806972 is a wasteful number, since it uses less digits than its factorization.

387806972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3090 (or 3081 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 387806972 is about 19692.8152380507. The cubic root of 387806972 is about 729.2423314192.

The spelling of 387806972 in words is "three hundred eighty-seven million, eight hundred six thousand, nine hundred seventy-two".