388760089 has 3 divisors (see below), whose sum is σ = 388779807. Its totient is φ = 388740372.

The previous prime is 388760087. The next prime is 388760101. The reversal of 388760089 is 980067883.

It is a happy number.

The square root of 388760089 is 19717.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 24255625 + 364504464 = 4925^2 + 19092^2 .

It is not a de Polignac number, because 388760089 - 2¹ = 388760087 is a prime.

It is a super-2 number, since 2×388760089² = 302268813598575842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388760087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9859 + ... + 29575.

It is an arithmetic number, because the mean of its divisors is an integer number (129593269).

Almost surely, 2^388760089 is an apocalyptic number.

388760089 is the 19717-th square number.

388760089 is the 9859-th centered octagonal number.

It is an amenable number.

388760089 is a deficient number, since it is larger than the sum of its proper divisors (19718).

388760089 is an frugal number, since it uses more digits than its factorization.

388760089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39434 (or 19717 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The cubic root of 388760089 is about 729.8392646673.

Multiplying 388760089 by its sum of digits (49), we get a square (19049244361 = 138019²).

The spelling of 388760089 in words is "three hundred eighty-eight million, seven hundred sixty thousand, eighty-nine".