1990199630 has 16 divisors (see below), whose sum is σ = 3606086304. Its totient is φ = 790807200.

The previous prime is 1990199599. The next prime is 1990199633. The reversal of 1990199630 is 369910991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990199633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657497 + ... + 660516.

It is an arithmetic number, because the mean of its divisors is an integer number (225380394).

Almost surely, 2^1990199630 is an apocalyptic number.

1990199630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1990199630 is a deficient number, since it is larger than the sum of its proper divisors (1615886674).

1990199630 is a wasteful number, since it uses less digits than its factorization.

1990199630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318171.

The product of its (nonzero) digits is 118098, while the sum is 47.

The square root of 1990199630 is about 44611.6535223701. The cubic root of 1990199630 is about 1257.8597305274.

The spelling of 1990199630 in words is "one billion, nine hundred ninety million, one hundred ninety-nine thousand, six hundred thirty".