1990667835 has 24 divisors (see below), whose sum is σ = 3715914384. Its totient is φ = 980020800.

The previous prime is 1990667831. The next prime is 1990667849. The reversal of 1990667835 is 5387660991.

It is not a de Polignac number, because 1990667835 - 2² = 1990667831 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1990667831) 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 23 ways as a sum of consecutive naturals, for example, 1700841 + ... + 1702010.

It is an arithmetic number, because the mean of its divisors is an integer number (154829766).

Almost surely, 2^1990667835 is an apocalyptic number.

1990667835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1990667835 is a deficient number, since it is larger than the sum of its proper divisors (1725246549).

1990667835 is a wasteful number, since it uses less digits than its factorization.

1990667835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3402875 (or 3402872 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 1990667835 is about 44616.9007776201. The cubic root of 1990667835 is about 1257.9583621804.

The spelling of 1990667835 in words is "one billion, nine hundred ninety million, six hundred sixty-seven thousand, eight hundred thirty-five".