1840449089 has 4 divisors (see below), whose sum is σ = 1840807620. Its totient is φ = 1840090560.

The previous prime is 1840449071. The next prime is 1840449097. The reversal of 1840449089 is 9809440481.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1764672064 + 75777025 = 42008^2 + 8705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1840449089 - 2¹² = 1840444993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1840449049) 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, 171452 + ... + 181869.

It is an arithmetic number, because the mean of its divisors is an integer number (460201905).

Almost surely, 2^1840449089 is an apocalyptic number.

It is an amenable number.

1840449089 is a deficient number, since it is larger than the sum of its proper divisors (358531).

1840449089 is an equidigital number, since it uses as much as digits as its factorization.

1840449089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358530.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 1840449089 is about 42900.4555803315. The cubic root of 1840449089 is about 1225.4848202304.

The spelling of 1840449089 in words is "one billion, eight hundred forty million, four hundred forty-nine thousand, eighty-nine".