388740473 has 4 divisors (see below), whose sum is σ = 424080528. Its totient is φ = 353400420.

The previous prime is 388740449. The next prime is 388740481. The reversal of 388740473 is 374047883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 388740473 - 2¹² = 388736377 is a prime.

It is a super-3 number, since 3×388740473³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (388740413) 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, 17670011 + ... + 17670032.

It is an arithmetic number, because the mean of its divisors is an integer number (106020132).

Almost surely, 2^388740473 is an apocalyptic number.

It is an amenable number.

388740473 is a deficient number, since it is larger than the sum of its proper divisors (35340055).

388740473 is a wasteful number, since it uses less digits than its factorization.

388740473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35340054.

The product of its (nonzero) digits is 451584, while the sum is 44.

The square root of 388740473 is about 19716.5025549665. The cubic root of 388740473 is about 729.8269890864.

The spelling of 388740473 in words is "three hundred eighty-eight million, seven hundred forty thousand, four hundred seventy-three".