389155815400 has 192 divisors, whose sum is σ = 1028791296000. Its totient is φ = 135614304000.

The previous prime is 389155815397. The next prime is 389155815427. The reversal of 389155815400 is 4518551983.

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, 6996901 + ... + 7052299.

It is an arithmetic number, because the mean of its divisors is an integer number (5358288000).

Almost surely, 2^389155815400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389155815400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514395648000).

389155815400 is an abundant number, since it is smaller than the sum of its proper divisors (639635480600).

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

389155815400 is a wasteful number, since it uses less digits than its factorization.

389155815400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55560 (or 55551 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 49.

The spelling of 389155815400 in words is "three hundred eighty-nine billion, one hundred fifty-five million, eight hundred fifteen thousand, four hundred".