1955198208 has 72 divisors (see below), whose sum is σ = 5230497888. Its totient is φ = 648374272.

The previous prime is 1955198197. The next prime is 1955198209. The reversal of 1955198208 is 8028915591.

It is a super-2 number, since 2×1955198208² = 7645600065132822528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955198209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144835 + ... + 157757.

It is an arithmetic number, because the mean of its divisors is an integer number (72645804).

Almost surely, 2^1955198208 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 1955198208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2615248944).

1955198208 is an abundant number, since it is smaller than the sum of its proper divisors (3275299680).

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

1955198208 is a wasteful number, since it uses less digits than its factorization.

1955198208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13139 (or 13125 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 48.

The square root of 1955198208 is about 44217.6232739843. The cubic root of 1955198208 is about 1250.4421279732.

The spelling of 1955198208 in words is "one billion, nine hundred fifty-five million, one hundred ninety-eight thousand, two hundred eight".