478136023 has 4 divisors (see below), whose sum is σ = 478180368. Its totient is φ = 478091680.

The previous prime is 478136017. The next prime is 478136039. The reversal of 478136023 is 320631874.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 478136023 - 2¹³ = 478127831 is a prime.

It is a super-2 number, since 2×478136023² = 457228112980513058, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478136023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478136003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5583 + ... + 31423.

It is an arithmetic number, because the mean of its divisors is an integer number (119545092).

Almost surely, 2^478136023 is an apocalyptic number.

478136023 is a deficient number, since it is larger than the sum of its proper divisors (44345).

478136023 is a wasteful number, since it uses less digits than its factorization.

478136023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44344.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 478136023 is about 21866.3216614043. The cubic root of 478136023 is about 781.9587102608.

Adding to 478136023 its reverse (320631874), we get a palindrome (798767897).

It can be divided in two parts, 4781 and 36023, that added together give a palindrome (40804).

The spelling of 478136023 in words is "four hundred seventy-eight million, one hundred thirty-six thousand, twenty-three".