478720811 has 4 divisors (see below), whose sum is σ = 479227272. Its totient is φ = 478214352.

The previous prime is 478720807. The next prime is 478720813. The reversal of 478720811 is 118027874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118027874 = 2 ⋅59013937.

It is a cyclic number.

It is not a de Polignac number, because 478720811 - 2² = 478720807 is a prime.

It is a super-2 number, since 2×478720811² = 458347229768995442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478720813) 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, 251810 + ... + 253703.

It is an arithmetic number, because the mean of its divisors is an integer number (119806818).

Almost surely, 2^478720811 is an apocalyptic number.

478720811 is a deficient number, since it is larger than the sum of its proper divisors (506461).

478720811 is an equidigital number, since it uses as much as digits as its factorization.

478720811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506460.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 478720811 is about 21879.6894630614. The cubic root of 478720811 is about 782.2773739521.

The spelling of 478720811 in words is "four hundred seventy-eight million, seven hundred twenty thousand, eight hundred eleven".