453945638 has 4 divisors (see below), whose sum is σ = 680918460. Its totient is φ = 226972818.

The previous prime is 453945629. The next prime is 453945659. The reversal of 453945638 is 836549354.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 453945592 and 453945601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113486408 + ... + 113486411.

It is an arithmetic number, because the mean of its divisors is an integer number (170229615).

Almost surely, 2^453945638 is an apocalyptic number.

453945638 is a deficient number, since it is larger than the sum of its proper divisors (226972822).

453945638 is a wasteful number, since it uses less digits than its factorization.

453945638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226972821.

The product of its digits is 1555200, while the sum is 47.

The square root of 453945638 is about 21306.0000469351. Note that the first 4 decimals coincide. The cubic root of 453945638 is about 768.5426067729.

The spelling of 453945638 in words is "four hundred fifty-three million, nine hundred forty-five thousand, six hundred thirty-eight".