1840478928 has 80 divisors (see below), whose sum is σ = 5166336000. Its totient is φ = 562446720.

The previous prime is 1840478921. The next prime is 1840478933. The reversal of 1840478928 is 8298740481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840478921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4278 + ... + 60821.

It is an arithmetic number, because the mean of its divisors is an integer number (64579200).

Almost surely, 2^1840478928 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 1840478928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2583168000).

1840478928 is an abundant number, since it is smaller than the sum of its proper divisors (3325857072).

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

1840478928 is a wasteful number, since it uses less digits than its factorization.

1840478928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65160 (or 65154 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 51.

The square root of 1840478928 is about 42900.8033491216. The cubic root of 1840478928 is about 1225.4914430785.

The spelling of 1840478928 in words is "one billion, eight hundred forty million, four hundred seventy-eight thousand, nine hundred twenty-eight".