388395137 has 8 divisors (see below), whose sum is σ = 421326696. Its totient is φ = 355900032.

The previous prime is 388395079. The next prime is 388395151. The reversal of 388395137 is 731593883.

It can be written as a sum of positive squares in 4 ways, for example, as 73119601 + 315275536 = 8551^2 + 17756^2 .

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 388395137 - 2¹⁸ = 388132993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 388395091 and 388395100.

It is not an unprimeable number, because it can be changed into a prime (388395157) 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, 107258 + ... + 110819.

It is an arithmetic number, because the mean of its divisors is an integer number (52665837).

Almost surely, 2^388395137 is an apocalyptic number.

It is an amenable number.

388395137 is a deficient number, since it is larger than the sum of its proper divisors (32931559).

388395137 is a wasteful number, since it uses less digits than its factorization.

388395137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218227.

The product of its digits is 544320, while the sum is 47.

The square root of 388395137 is about 19707.7430722039. The cubic root of 388395137 is about 729.6108121260.

It can be divided in two parts, 3883 and 95137, that multiplied together give a triangular number (369416971 = T₂₇₁₈₁).

The spelling of 388395137 in words is "three hundred eighty-eight million, three hundred ninety-five thousand, one hundred thirty-seven".