1998244526 has 4 divisors (see below), whose sum is σ = 2997366792. Its totient is φ = 999122262.

The previous prime is 1998244489. The next prime is 1998244537. The reversal of 1998244526 is 6254428991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6254428991 = 43 ⋅145451837.

It is a Curzon number.

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, 499561130 + ... + 499561133.

It is an arithmetic number, because the mean of its divisors is an integer number (749341698).

Almost surely, 2^1998244526 is an apocalyptic number.

1998244526 is a deficient number, since it is larger than the sum of its proper divisors (999122266).

1998244526 is an equidigital number, since it uses as much as digits as its factorization.

1998244526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999122265.

The product of its digits is 1244160, while the sum is 50.

The square root of 1998244526 is about 44701.7284453297. The cubic root of 1998244526 is about 1259.5523155490.

The spelling of 1998244526 in words is "one billion, nine hundred ninety-eight million, two hundred forty-four thousand, five hundred twenty-six".