389117770 has 16 divisors (see below), whose sum is σ = 703207008. Its totient is φ = 155026000.

The previous prime is 389117711. The next prime is 389117779. The reversal of 389117770 is 77711983.

It is not an unprimeable number, because it can be changed into a prime (389117779) 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, 75004 + ... + 80023.

It is an arithmetic number, because the mean of its divisors is an integer number (43950438).

Almost surely, 2^389117770 is an apocalyptic number.

389117770 is a deficient number, since it is larger than the sum of its proper divisors (314089238).

389117770 is a wasteful number, since it uses less digits than its factorization.

389117770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155285.

The product of its (nonzero) digits is 74088, while the sum is 43.

The square root of 389117770 is about 19726.0682853933. The cubic root of 389117770 is about 730.0630270221.

The spelling of 389117770 in words is "three hundred eighty-nine million, one hundred seventeen thousand, seven hundred seventy".