1951984098 has 48 divisors (see below), whose sum is σ = 4494442680. Its totient is φ = 610149888.

The previous prime is 1951984063. The next prime is 1951984109. The reversal of 1951984098 is 8904891591.

It can be written as a sum of positive squares in 4 ways, for example, as 1887294249 + 64689849 = 43443^2 + 8043^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73248 + ... + 96276.

Almost surely, 2^1951984098 is an apocalyptic number.

1951984098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1951984098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2247221340).

1951984098 is an abundant number, since it is smaller than the sum of its proper divisors (2542458582).

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

1951984098 is a wasteful number, since it uses less digits than its factorization.

1951984098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23331 (or 23328 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 54.

The square root of 1951984098 is about 44181.2641059533. The cubic root of 1951984098 is about 1249.7565601660.

It can be divided in two parts, 1951 and 984098, that added together give a square (986049 = 993²).

The spelling of 1951984098 in words is "one billion, nine hundred fifty-one million, nine hundred eighty-four thousand, ninety-eight".