1924421928 has 96 divisors (see below), whose sum is σ = 5683335840. Its totient is φ = 538287360.

The previous prime is 1924421903. The next prime is 1924421951. The reversal of 1924421928 is 8291244291.

It is a self number, because there is not a number n which added to its sum of digits gives 1924421928.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23050 + ... + 66182.

It is an arithmetic number, because the mean of its divisors is an integer number (59201415).

Almost surely, 2^1924421928 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 1924421928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2841667920).

1924421928 is an abundant number, since it is smaller than the sum of its proper divisors (3758913912).

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

1924421928 is a wasteful number, since it uses less digits than its factorization.

1924421928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43179 (or 43162 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 1924421928 is about 43868.2337004808. The cubic root of 1924421928 is about 1243.8464345890.

The spelling of 1924421928 in words is "one billion, nine hundred twenty-four million, four hundred twenty-one thousand, nine hundred twenty-eight".