384615820 has 24 divisors (see below), whose sum is σ = 855205344. Its totient is φ = 144796416.

The previous prime is 384615787. The next prime is 384615839. The reversal of 384615820 is 28516483.

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 384615820.

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, 565272 + ... + 565951.

It is an arithmetic number, because the mean of its divisors is an integer number (35633556).

Almost surely, 2^384615820 is an apocalyptic number.

It is an amenable number.

384615820 is an abundant number, since it is smaller than the sum of its proper divisors (470589524).

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

384615820 is a wasteful number, since it uses less digits than its factorization.

384615820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131249 (or 1131247 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 384615820 is about 19611.6246139885. The cubic root of 384615820 is about 727.2365779475.

The spelling of 384615820 in words is "three hundred eighty-four million, six hundred fifteen thousand, eight hundred twenty".