1728246890 has 16 divisors (see below), whose sum is σ = 3113047080. Its totient is φ = 690809280.

The previous prime is 1728246881. The next prime is 1728246913. The reversal of 1728246890 is 986428271.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1423779289 + 304467601 = 37733^2 + 17449^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46181 + ... + 74760.

Almost surely, 2^1728246890 is an apocalyptic number.

1728246890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1728246890 is a deficient number, since it is larger than the sum of its proper divisors (1384800190).

1728246890 is a wasteful number, since it uses less digits than its factorization.

1728246890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122377.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 1728246890 is about 41572.1889007543. The cubic root of 1728246890 is about 1200.0571477414.

The spelling of 1728246890 in words is "one billion, seven hundred twenty-eight million, two hundred forty-six thousand, eight hundred ninety".