1941891840 has 576 divisors, whose sum is σ = 8241408000. Its totient is φ = 423346176.

The previous prime is 1941891767. The next prime is 1941891859. The reversal of 1941891840 is 481981491.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5563986 + ... + 5564334.

It is an arithmetic number, because the mean of its divisors is an integer number (14308000).

Almost surely, 2^1941891840 is an apocalyptic number.

1941891840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1941891840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4120704000).

1941891840 is an abundant number, since it is smaller than the sum of its proper divisors (6299516160).

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

1941891840 is a wasteful number, since it uses less digits than its factorization.

1941891840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 389 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 1941891840 is about 44066.9018652321. The cubic root of 1941891840 is about 1247.5989835823.

The spelling of 1941891840 in words is "one billion, nine hundred forty-one million, eight hundred ninety-one thousand, eight hundred forty".