4121390728 has 192 divisors, whose sum is σ = 10129553280. Its totient is φ = 1529902080.

The previous prime is 4121390683. The next prime is 4121390731. The reversal of 4121390728 is 8270931214.

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, 30083076 + ... + 30083212.

It is an arithmetic number, because the mean of its divisors is an integer number (52758090).

Almost surely, 2^4121390728 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 4121390728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5064776640).

4121390728 is an abundant number, since it is smaller than the sum of its proper divisors (6008162552).

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

4121390728 is a wasteful number, since it uses less digits than its factorization.

4121390728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 4121390728 is about 64198.0585999296. The cubic root of 4121390728 is about 1603.2992764332.

The spelling of 4121390728 in words is "four billion, one hundred twenty-one million, three hundred ninety thousand, seven hundred twenty-eight".