389427490920 has 192 divisors, whose sum is σ = 1320067601280. Its totient is φ = 91691179008.

The previous prime is 389427490817. The next prime is 389427490957. The reversal of 389427490920 is 29094724983.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48994 + ... + 883886.

It is an arithmetic number, because the mean of its divisors is an integer number (6875352090).

Almost surely, 2^389427490920 is an apocalyptic number.

389427490920 is a gapful number since it is divisible by the number (30) 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 389427490920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660033800640).

389427490920 is an abundant number, since it is smaller than the sum of its proper divisors (930640110360).

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

389427490920 is a wasteful number, since it uses less digits than its factorization.

389427490920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834956 (or 834939 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 57.

The spelling of 389427490920 in words is "three hundred eighty-nine billion, four hundred twenty-seven million, four hundred ninety thousand, nine hundred twenty".