389549478 has 16 divisors (see below), whose sum is σ = 787132080. Its totient is φ = 128510976.

The previous prime is 389549473. The next prime is 389549483. The reversal of 389549478 is 874945983.

It is an interprime number because it is at equal distance from previous prime (389549473) and next prime (389549483).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389549473) 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, 334083 + ... + 335246.

It is an arithmetic number, because the mean of its divisors is an integer number (49195755).

Almost surely, 2^389549478 is an apocalyptic number.

389549478 is an abundant number, since it is smaller than the sum of its proper divisors (397582602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389549478 is a wasteful number, since it uses less digits than its factorization.

389549478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669431.

The product of its digits is 8709120, while the sum is 57.

The square root of 389549478 is about 19737.0078279358. The cubic root of 389549478 is about 730.3329175183.

The spelling of 389549478 in words is "three hundred eighty-nine million, five hundred forty-nine thousand, four hundred seventy-eight".