388031085 has 24 divisors (see below), whose sum is σ = 724325784. Its totient is φ = 191030400.

The previous prime is 388031071. The next prime is 388031087. The reversal of 388031085 is 580130883.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19881 + 388011204 = 141^2 + 19698^2 .

It is not a de Polignac number, because 388031085 - 2⁸ = 388030829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388031087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 331066 + ... + 332235.

It is an arithmetic number, because the mean of its divisors is an integer number (30180241).

Almost surely, 2^388031085 is an apocalyptic number.

It is an amenable number.

388031085 is a deficient number, since it is larger than the sum of its proper divisors (336294699).

388031085 is a wasteful number, since it uses less digits than its factorization.

388031085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663325 (or 663322 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 388031085 is about 19698.5046386775. The cubic root of 388031085 is about 729.3827803418.

The spelling of 388031085 in words is "three hundred eighty-eight million, thirty-one thousand, eighty-five".