457643618 has 4 divisors (see below), whose sum is σ = 686465430. Its totient is φ = 228821808.

The previous prime is 457643617. The next prime is 457643623. The reversal of 457643618 is 816346754.

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

It can be written as a sum of positive squares in only one way, i.e., 456976129 + 667489 = 21377^2 + 817^2 .

It is a super-2 number, since 2×457643618² = 418875362192259848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (457643617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114410903 + ... + 114410906.

Almost surely, 2^457643618 is an apocalyptic number.

457643618 is a deficient number, since it is larger than the sum of its proper divisors (228821812).

457643618 is a wasteful number, since it uses less digits than its factorization.

457643618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228821811.

The product of its digits is 483840, while the sum is 44.

The square root of 457643618 is about 21392.6066200452. The cubic root of 457643618 is about 770.6238930718.

The spelling of 457643618 in words is "four hundred fifty-seven million, six hundred forty-three thousand, six hundred eighteen".