1000998648 has 176 divisors, whose sum is σ = 3050454120. Its totient is φ = 306110016.

The previous prime is 1000998643. The next prime is 1000998667. The reversal of 1000998648 is 8468990001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000998643) by changing a digit.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 6141015 + ... + 6141177.

Almost surely, 2^1000998648 is an apocalyptic number.

1000998648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000998648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1525227060).

1000998648 is an abundant number, since it is smaller than the sum of its proper divisors (2049455472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000998648 is an equidigital number, since it uses as much as digits as its factorization.

1000998648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 1000998648 is about 31638.5626727890. The cubic root of 1000998648 is about 1000.3327719172.

The spelling of 1000998648 in words is "one billion, nine hundred ninety-eight thousand, six hundred forty-eight".