1996918378 has 16 divisors (see below), whose sum is σ = 3686618880. Its totient is φ = 789989616.

The previous prime is 1996918367. The next prime is 1996918421. The reversal of 1996918378 is 8738196991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5485858 + ... + 5486221.

It is an arithmetic number, because the mean of its divisors is an integer number (230413680).

Almost surely, 2^1996918378 is an apocalyptic number.

1996918378 is a deficient number, since it is larger than the sum of its proper divisors (1689700502).

1996918378 is a wasteful number, since it uses less digits than its factorization.

1996918378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10972101.

The product of its digits is 5878656, while the sum is 61.

The square root of 1996918378 is about 44686.8926867823. The cubic root of 1996918378 is about 1259.2736171862.

The spelling of 1996918378 in words is "one billion, nine hundred ninety-six million, nine hundred eighteen thousand, three hundred seventy-eight".