450513640 has 16 divisors (see below), whose sum is σ = 1013655780. Its totient is φ = 180205440.

The previous prime is 450513629. The next prime is 450513641. The reversal of 450513640 is 46315054.

It can be written as a sum of positive squares in 2 ways, for example, as 424442404 + 26071236 = 20602^2 + 5106^2 .

It is a junction number, because it is equal to n+sod(n) for n = 450513599 and 450513608.

It is not an unprimeable number, because it can be changed into a prime (450513641) 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, 5631381 + ... + 5631460.

Almost surely, 2^450513640 is an apocalyptic number.

450513640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

450513640 is an abundant number, since it is smaller than the sum of its proper divisors (563142140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

450513640 is a wasteful number, since it uses less digits than its factorization.

450513640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11262852 (or 11262848 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 450513640 is about 21225.3065937809. The cubic root of 450513640 is about 766.6008824042.

Adding to 450513640 its reverse (46315054), we get a palindrome (496828694).

It can be divided in two parts, 4505 and 13640, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 450513640 in words is "four hundred fifty million, five hundred thirteen thousand, six hundred forty".