384204749 has 4 divisors (see below), whose sum is σ = 384252636. Its totient is φ = 384156864.

The previous prime is 384204739. The next prime is 384204763. The reversal of 384204749 is 947402483.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 947402483 = 461 ⋅2055103.

It can be written as a sum of positive squares in 2 ways, for example, as 161747524 + 222457225 = 12718^2 + 14915^2 .

It is a cyclic number.

It is not a de Polignac number, because 384204749 - 2²⁸ = 115769293 is a prime.

It is a super-2 number, since 2×384204749² = 295226578308306002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384204739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8654 + ... + 29039.

It is an arithmetic number, because the mean of its divisors is an integer number (96063159).

Almost surely, 2^384204749 is an apocalyptic number.

It is an amenable number.

384204749 is a deficient number, since it is larger than the sum of its proper divisors (47887).

384204749 is a wasteful number, since it uses less digits than its factorization.

384204749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47886.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 384204749 is about 19601.1415228808. The cubic root of 384204749 is about 726.9773994653.

The spelling of 384204749 in words is "three hundred eighty-four million, two hundred four thousand, seven hundred forty-nine".