1990332620 has 12 divisors (see below), whose sum is σ = 4179698544. Its totient is φ = 796133040.

The previous prime is 1990332607. The next prime is 1990332637. The reversal of 1990332620 is 262330991.

It is a super-2 number, since 2×1990332620² = 7922847876472128800, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 49758296 + ... + 49758335.

It is an arithmetic number, because the mean of its divisors is an integer number (348308212).

Almost surely, 2^1990332620 is an apocalyptic number.

1990332620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1990332620 is an abundant number, since it is smaller than the sum of its proper divisors (2189365924).

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

1990332620 is a wasteful number, since it uses less digits than its factorization.

1990332620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99516640 (or 99516638 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 1990332620 is about 44613.1440272931. The cubic root of 1990332620 is about 1257.8877476565.

The spelling of 1990332620 in words is "one billion, nine hundred ninety million, three hundred thirty-two thousand, six hundred twenty".