384890121 has 48 divisors (see below), whose sum is σ = 695460480. Its totient is φ = 199272960.

The previous prime is 384890101. The next prime is 384890123. The reversal of 384890121 is 121098483.

It is not a de Polignac number, because 384890121 - 2⁷ = 384889993 is a prime.

It is a super-3 number, since 3×384890121³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (384890123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 257745 + ... + 259233.

It is an arithmetic number, because the mean of its divisors is an integer number (14488760).

Almost surely, 2^384890121 is an apocalyptic number.

It is an amenable number.

384890121 is a deficient number, since it is larger than the sum of its proper divisors (310570359).

384890121 is a wasteful number, since it uses less digits than its factorization.

384890121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886 (or 1883 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 384890121 is about 19618.6166943544. The cubic root of 384890121 is about 727.4094208267.

The spelling of 384890121 in words is "three hundred eighty-four million, eight hundred ninety thousand, one hundred twenty-one".