457638887 has 2 divisors, whose sum is σ = 457638888. Its totient is φ = 457638886.

The previous prime is 457638851. The next prime is 457638899. The reversal of 457638887 is 788836754.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-457638887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (457638787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228819443 + 228819444.

It is an arithmetic number, because the mean of its divisors is an integer number (228819444).

Almost surely, 2^457638887 is an apocalyptic number.

457638887 is a deficient number, since it is larger than the sum of its proper divisors (1).

457638887 is an equidigital number, since it uses as much as digits as its factorization.

457638887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9031680, while the sum is 56.

The square root of 457638887 is about 21392.4960441740. The cubic root of 457638887 is about 770.6212375599.

The spelling of 457638887 in words is "four hundred fifty-seven million, six hundred thirty-eight thousand, eight hundred eighty-seven".