1999366490 has 24 divisors (see below), whose sum is σ = 3955773780. Its totient is φ = 727041920.

The previous prime is 1999366489. The next prime is 1999366493. The reversal of 1999366490 is 946639991.

It can be written as a sum of positive squares in 2 ways, for example, as 1648441201 + 350925289 = 40601^2 + 18733^2 .

It is a super-2 number, since 2×1999366490² = 7994932722669840200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1999366493) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 824975 + ... + 827394.

Almost surely, 2^1999366490 is an apocalyptic number.

1999366490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1999366490 is a deficient number, since it is larger than the sum of its proper divisors (1956407290).

1999366490 is a wasteful number, since it uses less digits than its factorization.

1999366490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652398 (or 1652387 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 56.

The square root of 1999366490 is about 44714.2761319022. The cubic root of 1999366490 is about 1259.7880070825.

The spelling of 1999366490 in words is "one billion, nine hundred ninety-nine million, three hundred sixty-six thousand, four hundred ninety".