384213840 has 40 divisors (see below), whose sum is σ = 1191063648. Its totient is φ = 102456960.

The previous prime is 384213811. The next prime is 384213857. The reversal of 384213840 is 48312483.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 800206 + ... + 800685.

Almost surely, 2^384213840 is an apocalyptic number.

384213840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

384213840 is an abundant number, since it is smaller than the sum of its proper divisors (806849808).

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

384213840 is a wasteful number, since it uses less digits than its factorization.

384213840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600907 (or 1600901 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 384213840 is about 19601.3734212682. The cubic root of 384213840 is about 726.9831332999.

The spelling of 384213840 in words is "three hundred eighty-four million, two hundred thirteen thousand, eight hundred forty".