1930816890 has 48 divisors (see below), whose sum is σ = 5105224800. Its totient is φ = 506156256.

The previous prime is 1930816883. The next prime is 1930816961. The reversal of 1930816890 is 986180391.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176500 + ... + 187119.

It is an arithmetic number, because the mean of its divisors is an integer number (106358850).

Almost surely, 2^1930816890 is an apocalyptic number.

1930816890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1930816890 is an abundant number, since it is smaller than the sum of its proper divisors (3174407910).

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

1930816890 is a wasteful number, since it uses less digits than its factorization.

1930816890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363691 (or 363688 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1930816890 is about 43941.0615483968. The cubic root of 1930816890 is about 1245.2227017301. Note that the first 3 decimals are identical.

The spelling of 1930816890 in words is "one billion, nine hundred thirty million, eight hundred sixteen thousand, eight hundred ninety".