384447890 has 16 divisors (see below), whose sum is σ = 692236800. Its totient is φ = 153727920.

The previous prime is 384447851. The next prime is 384447929. The reversal of 384447890 is 98744483.

It is an interprime number because it is at equal distance from previous prime (384447851) and next prime (384447929).

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, 43985 + ... + 51995.

It is an arithmetic number, because the mean of its divisors is an integer number (43264800).

Almost surely, 2^384447890 is an apocalyptic number.

384447890 is a deficient number, since it is larger than the sum of its proper divisors (307788910).

384447890 is a wasteful number, since it uses less digits than its factorization.

384447890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12817.

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 384447890 is about 19607.3427572428. The cubic root of 384447890 is about 727.1307211328.

The spelling of 384447890 in words is "three hundred eighty-four million, four hundred forty-seven thousand, eight hundred ninety".