478223861 has 4 divisors (see below), whose sum is σ = 478420800. Its totient is φ = 478026924.

The previous prime is 478223831. The next prime is 478223869. The reversal of 478223861 is 168322874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 478223861 - 2¹⁸ = 477961717 is a prime.

It is a super-2 number, since 2×478223861² = 457396122459494642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478223869) 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, 94781 + ... + 99698.

It is an arithmetic number, because the mean of its divisors is an integer number (119605200).

Almost surely, 2^478223861 is an apocalyptic number.

It is an amenable number.

478223861 is a deficient number, since it is larger than the sum of its proper divisors (196939).

478223861 is a wasteful number, since it uses less digits than its factorization.

478223861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196938.

The product of its digits is 129024, while the sum is 41.

The square root of 478223861 is about 21868.3300917102. The cubic root of 478223861 is about 782.0065916726.

The spelling of 478223861 in words is "four hundred seventy-eight million, two hundred twenty-three thousand, eight hundred sixty-one".