1840772819 has 4 divisors (see below), whose sum is σ = 1850310696. Its totient is φ = 1831234944.

The previous prime is 1840772809. The next prime is 1840772837. The reversal of 1840772819 is 9182770481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1840772819 is a prime.

It is a super-4 number, since 4×1840772819⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1840772809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4768649 + ... + 4769034.

It is an arithmetic number, because the mean of its divisors is an integer number (462577674).

Almost surely, 2^1840772819 is an apocalyptic number.

1840772819 is a deficient number, since it is larger than the sum of its proper divisors (9537877).

1840772819 is an equidigital number, since it uses as much as digits as its factorization.

1840772819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9537876.

The product of its (nonzero) digits is 225792, while the sum is 47.

The square root of 1840772819 is about 42904.2284512844. The cubic root of 1840772819 is about 1225.5566691693.

The spelling of 1840772819 in words is "one billion, eight hundred forty million, seven hundred seventy-two thousand, eight hundred nineteen".