1928424040 has 16 divisors (see below), whose sum is σ = 4338954180. Its totient is φ = 771369600.

The previous prime is 1928423999. The next prime is 1928424041. The reversal of 1928424040 is 404248291.

It can be written as a sum of positive squares in 2 ways, for example, as 1865030596 + 63393444 = 43186^2 + 7962^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1928423987 and 1928424005.

It is not an unprimeable number, because it can be changed into a prime (1928424041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24105261 + ... + 24105340.

Almost surely, 2^1928424040 is an apocalyptic number.

1928424040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1928424040 is an abundant number, since it is smaller than the sum of its proper divisors (2410530140).

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

1928424040 is a wasteful number, since it uses less digits than its factorization.

1928424040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48210612 (or 48210608 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 1928424040 is about 43913.8251579158. The cubic root of 1928424040 is about 1244.7080900330.

The spelling of 1928424040 in words is "one billion, nine hundred twenty-eight million, four hundred twenty-four thousand, forty".