1782240481 has 4 divisors (see below), whose sum is σ = 2036846272. Its totient is φ = 1527634692.

The previous prime is 1782240433. The next prime is 1782240539. The reversal of 1782240481 is 1840422871.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1782240481 is a prime.

It is a super-2 number, since 2×1782240481² = 6352762264230222722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1782240481.

It is not an unprimeable number, because it can be changed into a prime (1782241481) 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, 127302885 + ... + 127302898.

It is an arithmetic number, because the mean of its divisors is an integer number (509211568).

Almost surely, 2^1782240481 is an apocalyptic number.

It is an amenable number.

1782240481 is a deficient number, since it is larger than the sum of its proper divisors (254605791).

1782240481 is an equidigital number, since it uses as much as digits as its factorization.

1782240481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254605790.

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 1782240481 is about 42216.5901157353. The cubic root of 1782240481 is about 1212.4265402904.

The spelling of 1782240481 in words is "one billion, seven hundred eighty-two million, two hundred forty thousand, four hundred eighty-one".