3816531920 has 30 divisors (see below), whose sum is σ = 8874721602. Its totient is φ = 1526391744.

The previous prime is 3816531913. The next prime is 3816531931. The reversal of 3816531920 is 291356183.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3053225536 + 763306384 = 55256^2 + 27628^2 .

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 5 ways as a sum of consecutive naturals, for example, 549107 + ... + 556013.

Almost surely, 2^3816531920 is an apocalyptic number.

It is an amenable number.

3816531920 is an abundant number, since it is smaller than the sum of its proper divisors (5058189682).

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

3816531920 is an frugal number, since it uses more digits than its factorization.

3816531920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13827 (or 6914 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 3816531920 is about 61778.0860823642. The cubic root of 3816531920 is about 1562.7504513306.

The spelling of 3816531920 in words is "three billion, eight hundred sixteen million, five hundred thirty-one thousand, nine hundred twenty".