1998281474 has 8 divisors (see below), whose sum is σ = 3425625408. Its totient is φ = 856406340.

The previous prime is 1998281437. The next prime is 1998281477. The reversal of 1998281474 is 4741828991.

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

It is a super-2 number, since 2×1998281474² = 7986257698663225352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1998281477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71367182 + ... + 71367209.

It is an arithmetic number, because the mean of its divisors is an integer number (428203176).

Almost surely, 2^1998281474 is an apocalyptic number.

1998281474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1998281474 is a deficient number, since it is larger than the sum of its proper divisors (1427343934).

1998281474 is a wasteful number, since it uses less digits than its factorization.

1998281474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142734400.

The product of its digits is 1161216, while the sum is 53.

The square root of 1998281474 is about 44702.1417160297. The cubic root of 1998281474 is about 1259.5600786383.

The spelling of 1998281474 in words is "one billion, nine hundred ninety-eight million, two hundred eighty-one thousand, four hundred seventy-four".