388474745 has 4 divisors (see below), whose sum is σ = 466169700. Its totient is φ = 310779792.

The previous prime is 388474727. The next prime is 388474747. The reversal of 388474745 is 547474883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547474883 = 1531 ⋅357593.

It can be written as a sum of positive squares in 2 ways, for example, as 223711849 + 164762896 = 14957^2 + 12836^2 .

It is a cyclic number.

It is not a de Polignac number, because 388474745 - 2²² = 384280441 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 388474693 and 388474702.

It is not an unprimeable number, because it can be changed into a prime (388474747) 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, 38847470 + ... + 38847479.

It is an arithmetic number, because the mean of its divisors is an integer number (116542425).

Almost surely, 2^388474745 is an apocalyptic number.

It is an amenable number.

388474745 is a deficient number, since it is larger than the sum of its proper divisors (77694955).

388474745 is an equidigital number, since it uses as much as digits as its factorization.

388474745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77694954.

The product of its digits is 3010560, while the sum is 50.

The square root of 388474745 is about 19709.7626824881. The cubic root of 388474745 is about 729.6606573172.

The spelling of 388474745 in words is "three hundred eighty-eight million, four hundred seventy-four thousand, seven hundred forty-five".