389948129640 has 160 divisors (see below), whose sum is σ = 1335388994280. Its totient is φ = 102024119808.

The previous prime is 389948129633. The next prime is 389948129689. The reversal of 389948129640 is 46921849983.

389948129640 is a `hidden beast` number, since 3 + 8 + 99 + 481 + 2 + 9 + 64 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 353756111076 + 36192018564 = 594774^2 + 190242^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 963699 + ... + 1307138.

Almost surely, 2^389948129640 is an apocalyptic number.

389948129640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

389948129640 is an abundant number, since it is smaller than the sum of its proper divisors (945440864640).

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

389948129640 is a wasteful number, since it uses less digits than its factorization.

389948129640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270913 (or 2270900 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 63.

The spelling of 389948129640 in words is "three hundred eighty-nine billion, nine hundred forty-eight million, one hundred twenty-nine thousand, six hundred forty".