1678383890 has 16 divisors (see below), whose sum is σ = 3070618200. Its totient is φ = 660347520.

The previous prime is 1678383877. The next prime is 1678383923. The reversal of 1678383890 is 983838761.

It can be written as a sum of positive squares in 4 ways, for example, as 651117289 + 1027266601 = 25517^2 + 32051^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1375115 + ... + 1376334.

Almost surely, 2^1678383890 is an apocalyptic number.

1678383890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1678383890 is a deficient number, since it is larger than the sum of its proper divisors (1392234310).

1678383890 is a wasteful number, since it uses less digits than its factorization.

1678383890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751517.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 1678383890 is about 40968.0837970242. The cubic root of 1678383890 is about 1188.4030765212.

The spelling of 1678383890 in words is "one billion, six hundred seventy-eight million, three hundred eighty-three thousand, eight hundred ninety".