451343638 has 4 divisors (see below), whose sum is σ = 677015460. Its totient is φ = 225671818.

The previous prime is 451343611. The next prime is 451343639. The reversal of 451343638 is 836343154.

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

It is a super-2 number, since 2×451343638² = 407422159126150088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 451343597 and 451343606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451343639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112835908 + ... + 112835911.

It is an arithmetic number, because the mean of its divisors is an integer number (169253865).

Almost surely, 2^451343638 is an apocalyptic number.

451343638 is a deficient number, since it is larger than the sum of its proper divisors (225671822).

451343638 is a wasteful number, since it uses less digits than its factorization.

451343638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225671821.

The product of its digits is 103680, while the sum is 37.

The square root of 451343638 is about 21244.8496817464. The cubic root of 451343638 is about 767.0713726747.

The spelling of 451343638 in words is "four hundred fifty-one million, three hundred forty-three thousand, six hundred thirty-eight".