1798091242 has 4 divisors (see below), whose sum is σ = 2697136866. Its totient is φ = 899045620.

The previous prime is 1798091227. The next prime is 1798091293. The reversal of 1798091242 is 2421908971.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1431789921 + 366301321 = 37839^2 + 19139^2 .

It is a super-2 number, since 2×1798091242² = 6466264229114205128, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 449522809 + ... + 449522812.

Almost surely, 2^1798091242 is an apocalyptic number.

1798091242 is a deficient number, since it is larger than the sum of its proper divisors (899045624).

1798091242 is an equidigital number, since it uses as much as digits as its factorization.

1798091242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899045623.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 1798091242 is about 42403.9059757471. The cubic root of 1798091242 is about 1216.0102673454.

The spelling of 1798091242 in words is "one billion, seven hundred ninety-eight million, ninety-one thousand, two hundred forty-two".