388156789 has 8 divisors (see below), whose sum is σ = 395850240. Its totient is φ = 380477136.

The previous prime is 388156777. The next prime is 388156819. The reversal of 388156789 is 987651883.

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 388156789 - 2⁹ = 388156277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388156709) 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, 67572 + ... + 73090.

It is an arithmetic number, because the mean of its divisors is an integer number (49481280).

Almost surely, 2^388156789 is an apocalyptic number.

It is an amenable number.

388156789 is a deficient number, since it is larger than the sum of its proper divisors (7693451).

388156789 is a wasteful number, since it uses less digits than its factorization.

388156789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6899.

The product of its digits is 2903040, while the sum is 55.

The square root of 388156789 is about 19701.6950793580. The cubic root of 388156789 is about 729.4615338555.

The spelling of 388156789 in words is "three hundred eighty-eight million, one hundred fifty-six thousand, seven hundred eighty-nine".