384400053 has 8 divisors (see below), whose sum is σ = 569481600. Its totient is φ = 256266684.

The previous prime is 384400021. The next prime is 384400057. The reversal of 384400053 is 350004483.

It is a happy number.

It is not a de Polignac number, because 384400053 - 2⁵ = 384400021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 14237039 = 384400053 / (3 + 8 + 4 + 4 + 0 + 0 + 0 + 5 + 3).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384400057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7118493 + ... + 7118546.

It is an arithmetic number, because the mean of its divisors is an integer number (71185200).

Almost surely, 2^384400053 is an apocalyptic number.

It is an amenable number.

384400053 is a deficient number, since it is larger than the sum of its proper divisors (185081547).

384400053 is a wasteful number, since it uses less digits than its factorization.

384400053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14237048 (or 14237042 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 384400053 is about 19606.1228446626. The cubic root of 384400053 is about 727.1005608293.

The spelling of 384400053 in words is "three hundred eighty-four million, four hundred thousand, fifty-three".