389578140 has 192 divisors, whose sum is σ = 1445713920. Its totient is φ = 85155840.

The previous prime is 389578139. The next prime is 389578153. The reversal of 389578140 is 41875983.

389578140 is a `hidden beast` number, since 38 + 9 + 578 + 1 + 40 = 666.

It is a super-2 number, since 2×389578140² = 303542254331719200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 84700 + ... + 89180.

It is an arithmetic number, because the mean of its divisors is an integer number (7529760).

Almost surely, 2^389578140 is an apocalyptic number.

389578140 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 389578140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722856960).

389578140 is an abundant number, since it is smaller than the sum of its proper divisors (1056135780).

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

389578140 is a wasteful number, since it uses less digits than its factorization.

389578140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529 (or 4521 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 389578140 is about 19737.7339124835. The cubic root of 389578140 is about 730.3508290545.

The spelling of 389578140 in words is "three hundred eighty-nine million, five hundred seventy-eight thousand, one hundred forty".