450648639 has 18 divisors (see below), whose sum is σ = 757213080. Its totient is φ = 257513256.

The previous prime is 450648607. The next prime is 450648673. The reversal of 450648639 is 936846054.

450648639 is a `hidden beast` number, since 4 + 5 + 0 + 6 + 4 + 8 + 639 = 666.

It is not a de Polignac number, because 450648639 - 2⁵ = 450648607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 450648594 and 450648603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450648689) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 510499 + ... + 511380.

Almost surely, 2^450648639 is an apocalyptic number.

450648639 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

450648639 is a deficient number, since it is larger than the sum of its proper divisors (306564441).

450648639 is a wasteful number, since it uses less digits than its factorization.

450648639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021899 (or 1021889 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 450648639 is about 21228.4864980997. The cubic root of 450648639 is about 766.6774468764.

The spelling of 450648639 in words is "four hundred fifty million, six hundred forty-eight thousand, six hundred thirty-nine".