1098211950 has 144 divisors (see below), whose sum is σ = 3242538000. Its totient is φ = 264268800.

The previous prime is 1098211949. The next prime is 1098211957. The reversal of 1098211950 is 591128901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098211957) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 736806 + ... + 738294.

It is an arithmetic number, because the mean of its divisors is an integer number (22517625).

Almost surely, 2^1098211950 is an apocalyptic number.

1098211950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1098211950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621269000).

1098211950 is an abundant number, since it is smaller than the sum of its proper divisors (2144326050).

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

1098211950 is a wasteful number, since it uses less digits than its factorization.

1098211950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667 (or 1659 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The square root of 1098211950 is about 33139.2810724675. The cubic root of 1098211950 is about 1031.7204883462.

The spelling of 1098211950 in words is "one billion, ninety-eight million, two hundred eleven thousand, nine hundred fifty".