478144446 has 32 divisors (see below), whose sum is σ = 1031159808. Its totient is φ = 146934240.

The previous prime is 478144441. The next prime is 478144463. The reversal of 478144446 is 644441874.

It is a happy number.

It is a super-2 number, since 2×478144446² = 457244222481293832, which contains 22 as substring.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 478144398 and 478144407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478144441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65731 + ... + 72641.

It is an arithmetic number, because the mean of its divisors is an integer number (32223744).

Almost surely, 2^478144446 is an apocalyptic number.

478144446 is an abundant number, since it is smaller than the sum of its proper divisors (553015362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

478144446 is a wasteful number, since it uses less digits than its factorization.

478144446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7816.

The product of its digits is 344064, while the sum is 42.

The square root of 478144446 is about 21866.5142626803. The cubic root of 478144446 is about 781.9633019803.

The spelling of 478144446 in words is "four hundred seventy-eight million, one hundred forty-four thousand, four hundred forty-six".