1841994540 has 192 divisors, whose sum is σ = 6109931520. Its totient is φ = 459095040.

The previous prime is 1841994529. The next prime is 1841994541. The reversal of 1841994540 is 454991481.

It is a happy number.

1841994540 is a `hidden beast` number, since 1 + 8 + 4 + 19 + 94 + 540 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1841994541) by changing a digit.

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, 1495725 + ... + 1496955.

It is an arithmetic number, because the mean of its divisors is an integer number (31822560).

Almost surely, 2^1841994540 is an apocalyptic number.

1841994540 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 1841994540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3054965760).

1841994540 is an abundant number, since it is smaller than the sum of its proper divisors (4267936980).

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

1841994540 is a wasteful number, since it uses less digits than its factorization.

1841994540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429 (or 1421 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1841994540 is about 42918.4638588102. The cubic root of 1841994540 is about 1225.8277432124.

The spelling of 1841994540 in words is "one billion, eight hundred forty-one million, nine hundred ninety-four thousand, five hundred forty".