1996679890 has 8 divisors (see below), whose sum is σ = 3594023820. Its totient is φ = 798671952.

The previous prime is 1996679873. The next prime is 1996679917. The reversal of 1996679890 is 989766991.

It can be written as a sum of positive squares in 2 ways, for example, as 1973225241 + 23454649 = 44421^2 + 4843^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99833985 + ... + 99834004.

Almost surely, 2^1996679890 is an apocalyptic number.

1996679890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1996679890 is a deficient number, since it is larger than the sum of its proper divisors (1597343930).

1996679890 is a wasteful number, since it uses less digits than its factorization.

1996679890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199667996.

The product of its (nonzero) digits is 13226976, while the sum is 64.

The square root of 1996679890 is about 44684.2241736387. The cubic root of 1996679890 is about 1259.2234843405.

It can be divided in two parts, 19966 and 79890, that added together give a square (99856 = 316²).

The spelling of 1996679890 in words is "one billion, nine hundred ninety-six million, six hundred seventy-nine thousand, eight hundred ninety".