457640823 has 16 divisors (see below), whose sum is σ = 615444480. Its totient is φ = 302477664.

The previous prime is 457640801. The next prime is 457640831. The reversal of 457640823 is 328046754.

It is a happy number.

It is not a de Polignac number, because 457640823 - 2⁸ = 457640567 is a prime.

It is a super-2 number, since 2×457640823² = 418870245752234658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (457640423) 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 in 15 ways as a sum of consecutive naturals, for example, 178690 + ... + 181232.

It is an arithmetic number, because the mean of its divisors is an integer number (38465280).

Almost surely, 2^457640823 is an apocalyptic number.

457640823 is a deficient number, since it is larger than the sum of its proper divisors (157803657).

457640823 is a wasteful number, since it uses less digits than its factorization.

457640823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038.

The product of its (nonzero) digits is 161280, while the sum is 39.

The square root of 457640823 is about 21392.5412936378. The cubic root of 457640823 is about 770.6223242396.

The spelling of 457640823 in words is "four hundred fifty-seven million, six hundred forty thousand, eight hundred twenty-three".