387409806 has 24 divisors (see below), whose sum is σ = 959300784. Its totient is φ = 110688480.

The previous prime is 387409801. The next prime is 387409831. The reversal of 387409806 is 608904783.

It is a happy number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387409801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1537215 + ... + 1537466.

It is an arithmetic number, because the mean of its divisors is an integer number (39970866).

Almost surely, 2^387409806 is an apocalyptic number.

387409806 is an abundant number, since it is smaller than the sum of its proper divisors (571890978).

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

387409806 is a wasteful number, since it uses less digits than its factorization.

387409806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074696 (or 3074693 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 387409806 is about 19682.7286218146. The cubic root of 387409806 is about 728.9932992887.

The spelling of 387409806 in words is "three hundred eighty-seven million, four hundred nine thousand, eight hundred six".