1098648628 has 144 divisors (see below), whose sum is σ = 2602309248. Its totient is φ = 393984000.

The previous prime is 1098648623. The next prime is 1098648689. The reversal of 1098648628 is 8268468901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098648623) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4558588 + ... + 4558828.

It is an arithmetic number, because the mean of its divisors is an integer number (18071592).

Almost surely, 2^1098648628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1098648628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1301154624).

1098648628 is an abundant number, since it is smaller than the sum of its proper divisors (1503660620).

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

1098648628 is a wasteful number, since it uses less digits than its factorization.

1098648628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 52.

The square root of 1098648628 is about 33145.8689432032. The cubic root of 1098648628 is about 1031.8572166400.

The spelling of 1098648628 in words is "one billion, ninety-eight million, six hundred forty-eight thousand, six hundred twenty-eight".