1954105398 has 144 divisors (see below), whose sum is σ = 5274307584. Its totient is φ = 540101520.

The previous prime is 1954105357. The next prime is 1954105399. The reversal of 1954105398 is 8935014591.

1954105398 is a `hidden beast` number, since 19 + 541 + 0 + 5 + 3 + 98 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1954105399) 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, 736911 + ... + 739557.

It is an arithmetic number, because the mean of its divisors is an integer number (36627136).

Almost surely, 2^1954105398 is an apocalyptic number.

1954105398 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 1954105398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2637153792).

1954105398 is an abundant number, since it is smaller than the sum of its proper divisors (3320202186).

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

1954105398 is a wasteful number, since it uses less digits than its factorization.

1954105398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709 (or 2690 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 1954105398 is about 44205.2643697558. The cubic root of 1954105398 is about 1250.2091165876.

The spelling of 1954105398 in words is "one billion, nine hundred fifty-four million, one hundred five thousand, three hundred ninety-eight".