1944571398 has 96 divisors (see below), whose sum is σ = 4909040640. Its totient is φ = 502656000.

The previous prime is 1944571313. The next prime is 1944571399. The reversal of 1944571398 is 8931754491.

It is a self number, because there is not a number n which added to its sum of digits gives 1944571398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944571399) 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, 1213798 + ... + 1215398.

It is an arithmetic number, because the mean of its divisors is an integer number (51135840).

Almost surely, 2^1944571398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1944571398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2454520320).

1944571398 is an abundant number, since it is smaller than the sum of its proper divisors (2964469242).

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

1944571398 is a wasteful number, since it uses less digits than its factorization.

1944571398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874 (or 1863 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 1944571398 is about 44097.2946789256. The cubic root of 1944571398 is about 1248.1725612494.

The spelling of 1944571398 in words is "one billion, nine hundred forty-four million, five hundred seventy-one thousand, three hundred ninety-eight".