1990656002 has 8 divisors (see below), whose sum is σ = 2990005056. Its totient is φ = 993987652.

The previous prime is 1990655993. The next prime is 1990656007. The reversal of 1990656002 is 2006560991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1990656002² = 7925422636597248008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1990656007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668318 + ... + 671289.

It is an arithmetic number, because the mean of its divisors is an integer number (373750632).

Almost surely, 2^1990656002 is an apocalyptic number.

1990656002 is a deficient number, since it is larger than the sum of its proper divisors (999349054).

1990656002 is a wasteful number, since it uses less digits than its factorization.

1990656002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340352.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 1990656002 is about 44616.7681707225. The cubic root of 1990656002 is about 1257.9558696416.

The spelling of 1990656002 in words is "one billion, nine hundred ninety million, six hundred fifty-six thousand, two".