1998794974 has 8 divisors (see below), whose sum is σ = 3270755448. Its totient is φ = 908543160.

The previous prime is 1998794971. The next prime is 1998794983. The reversal of 1998794974 is 4794978991.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998794971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45427137 + ... + 45427180.

It is an arithmetic number, because the mean of its divisors is an integer number (408844431).

Almost surely, 2^1998794974 is an apocalyptic number.

1998794974 is a deficient number, since it is larger than the sum of its proper divisors (1271960474).

1998794974 is a wasteful number, since it uses less digits than its factorization.

1998794974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90854330.

The product of its digits is 41150592, while the sum is 67.

The square root of 1998794974 is about 44707.8849197767. The cubic root of 1998794974 is about 1259.6679594541.

The spelling of 1998794974 in words is "one billion, nine hundred ninety-eight million, seven hundred ninety-four thousand, nine hundred seventy-four".