1990676481 has 8 divisors (see below), whose sum is σ = 2655446784. Its totient is φ = 1326511920.

The previous prime is 1990676477. The next prime is 1990676507. The reversal of 1990676481 is 1846760991.

It is a happy number.

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

It is not a de Polignac number, because 1990676481 - 2² = 1990676477 is a prime.

It is a super-2 number, since 2×1990676481² = 7925585704013086722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1990676431) 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, 143710 + ... + 156951.

It is an arithmetic number, because the mean of its divisors is an integer number (331930848).

Almost surely, 2^1990676481 is an apocalyptic number.

It is an amenable number.

1990676481 is a deficient number, since it is larger than the sum of its proper divisors (664770303).

1990676481 is a wasteful number, since it uses less digits than its factorization.

1990676481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302871.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 1990676481 is about 44616.9976690499. The cubic root of 1990676481 is about 1257.9601833937.

The spelling of 1990676481 in words is "one billion, nine hundred ninety million, six hundred seventy-six thousand, four hundred eighty-one".