1916040728 has 48 divisors (see below), whose sum is σ = 4268077920. Its totient is φ = 803681088.

The previous prime is 1916040677. The next prime is 1916040751. The reversal of 1916040728 is 8270406191.

It is a junction number, because it is equal to n+sod(n) for n = 1916040691 and 1916040700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33575 + ... + 70422.

It is an arithmetic number, because the mean of its divisors is an integer number (88918290).

Almost surely, 2^1916040728 is an apocalyptic number.

It is an amenable number.

1916040728 is an abundant number, since it is smaller than the sum of its proper divisors (2352037192).

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

1916040728 is a wasteful number, since it uses less digits than its factorization.

1916040728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104064 (or 104053 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1916040728 is about 43772.6024814609. The cubic root of 1916040728 is about 1242.0380826114.

The spelling of 1916040728 in words is "one billion, nine hundred sixteen million, forty thousand, seven hundred twenty-eight".