389903976 has 384 divisors, whose sum is σ = 1462665600. Its totient is φ = 94832640.

The previous prime is 389903953. The next prime is 389904007. The reversal of 389903976 is 679309983.

It is a super-2 number, since 2×389903976² = 304050221001217152, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 95 ways as a sum of consecutive naturals, for example, 1979110 + ... + 1979306.

It is an arithmetic number, because the mean of its divisors is an integer number (3809025).

Almost surely, 2^389903976 is an apocalyptic number.

389903976 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389903976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731332800).

389903976 is an abundant number, since it is smaller than the sum of its proper divisors (1072761624).

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

389903976 is a wasteful number, since it uses less digits than its factorization.

389903976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 389903976 is about 19745.9863263398. The cubic root of 389903976 is about 730.5543896527.

The spelling of 389903976 in words is "three hundred eighty-nine million, nine hundred three thousand, nine hundred seventy-six".