450868781 has 16 divisors (see below), whose sum is σ = 524620800. Its totient is φ = 382932480.

The previous prime is 450868777. The next prime is 450868787. The reversal of 450868781 is 187868054.

It is a happy number.

It is not a de Polignac number, because 450868781 - 2² = 450868777 is a prime.

It is a super-2 number, since 2×450868781² = 406565315360851922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450868787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16820 + ... + 34418.

It is an arithmetic number, because the mean of its divisors is an integer number (32788800).

Almost surely, 2^450868781 is an apocalyptic number.

It is an amenable number.

450868781 is a deficient number, since it is larger than the sum of its proper divisors (73752019).

450868781 is a wasteful number, since it uses less digits than its factorization.

450868781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17764.

The product of its (nonzero) digits is 430080, while the sum is 47.

The square root of 450868781 is about 21233.6709261493. The cubic root of 450868781 is about 766.8022672772.

The spelling of 450868781 in words is "four hundred fifty million, eight hundred sixty-eight thousand, seven hundred eighty-one".