389540782 has 4 divisors (see below), whose sum is σ = 584311176. Its totient is φ = 194770390.

The previous prime is 389540687. The next prime is 389540791. The reversal of 389540782 is 287045983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 287045983 = 7 ⋅41006569.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97385194 + ... + 97385197.

It is an arithmetic number, because the mean of its divisors is an integer number (146077794).

Almost surely, 2^389540782 is an apocalyptic number.

389540782 is a deficient number, since it is larger than the sum of its proper divisors (194770394).

389540782 is a wasteful number, since it uses less digits than its factorization.

389540782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194770393.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 389540782 is about 19736.7875298895. The cubic root of 389540782 is about 730.3274830162.

The spelling of 389540782 in words is "three hundred eighty-nine million, five hundred forty thousand, seven hundred eighty-two".