1988000494 has 4 divisors (see below), whose sum is σ = 2982000744. Its totient is φ = 994000246.

The previous prime is 1988000461. The next prime is 1988000537. The reversal of 1988000494 is 4940008891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4940008891 = 13249 ⋅372859.

It is a self number, because there is not a number n which added to its sum of digits gives 1988000494.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497000122 + ... + 497000125.

It is an arithmetic number, because the mean of its divisors is an integer number (745500186).

Almost surely, 2^1988000494 is an apocalyptic number.

1988000494 is a deficient number, since it is larger than the sum of its proper divisors (994000250).

1988000494 is an equidigital number, since it uses as much as digits as its factorization.

1988000494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994000249.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 1988000494 is about 44586.9991589477. Note that the first 3 decimals coincide. The cubic root of 1988000494 is about 1257.3962553950.

The spelling of 1988000494 in words is "one billion, nine hundred eighty-eight million, four hundred ninety-four", and thus it is an aban number.