384203778 has 32 divisors (see below), whose sum is σ = 878760960. Its totient is φ = 109699920.

The previous prime is 384203767. The next prime is 384203779. The reversal of 384203778 is 877302483.

It is a super-3 number, since 3×384203778³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (384203779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123243 + ... + 126321.

It is an arithmetic number, because the mean of its divisors is an integer number (27461280).

Almost surely, 2^384203778 is an apocalyptic number.

384203778 is an abundant number, since it is smaller than the sum of its proper divisors (494557182).

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

384203778 is a wasteful number, since it uses less digits than its factorization.

384203778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6062.

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 384203778 is about 19601.1167538995. The cubic root of 384203778 is about 726.9767870352.

The spelling of 384203778 in words is "three hundred eighty-four million, two hundred three thousand, seven hundred seventy-eight".