388553945 has 8 divisors (see below), whose sum is σ = 502131336. Its totient is φ = 286932096.

The previous prime is 388553941. The next prime is 388553947. The reversal of 388553945 is 549355883.

It can be written as a sum of positive squares in 4 ways, for example, as 1408969 + 387144976 = 1187^2 + 19676^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 388553945 - 2² = 388553941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 388553893 and 388553902.

It is not an unprimeable number, because it can be changed into a prime (388553941) 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, 2988812 + ... + 2988941.

It is an arithmetic number, because the mean of its divisors is an integer number (62766417).

Almost surely, 2^388553945 is an apocalyptic number.

It is an amenable number.

388553945 is a deficient number, since it is larger than the sum of its proper divisors (113577391).

388553945 is a wasteful number, since it uses less digits than its factorization.

388553945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5977771.

The product of its digits is 2592000, while the sum is 50.

The square root of 388553945 is about 19711.7717367060. The cubic root of 388553945 is about 729.7102402892.

The spelling of 388553945 in words is "three hundred eighty-eight million, five hundred fifty-three thousand, nine hundred forty-five".