450315640 has 16 divisors (see below), whose sum is σ = 1013210280. Its totient is φ = 180126240.

The previous prime is 450315623. The next prime is 450315647. The reversal of 450315640 is 46513054.

It is a junction number, because it is equal to n+sod(n) for n = 450315599 and 450315608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450315647) 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, 5628906 + ... + 5628985.

Almost surely, 2^450315640 is an apocalyptic number.

450315640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

450315640 is an abundant number, since it is smaller than the sum of its proper divisors (562894640).

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

450315640 is a wasteful number, since it uses less digits than its factorization.

450315640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11257902 (or 11257898 counting only the distinct ones).

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

The square root of 450315640 is about 21220.6418376071. The cubic root of 450315640 is about 766.4885593405.

Adding to 450315640 its reverse (46513054), we get a palindrome (496828694).

The spelling of 450315640 in words is "four hundred fifty million, three hundred fifteen thousand, six hundred forty".