1742440809 has 8 divisors (see below), whose sum is σ = 2445531040. Its totient is φ = 1100488896.

The previous prime is 1742440801. The next prime is 1742440811. The reversal of 1742440809 is 9080442471.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1742440809 - 2³ = 1742440801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1742440801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15284512 + ... + 15284625.

It is an arithmetic number, because the mean of its divisors is an integer number (305691380).

Almost surely, 2^1742440809 is an apocalyptic number.

1742440809 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1742440809 is a deficient number, since it is larger than the sum of its proper divisors (703090231).

1742440809 is a wasteful number, since it uses less digits than its factorization.

1742440809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30569159.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1742440809 is about 41742.5539348037. The cubic root of 1742440809 is about 1203.3335110398. Note that the first 3 decimals are identical.

The spelling of 1742440809 in words is "one billion, seven hundred forty-two million, four hundred forty thousand, eight hundred nine".