478688250440 has 32 divisors (see below), whose sum is σ = 1077068535480. Its totient is φ = 191471749632.

The previous prime is 478688250419. The next prime is 478688250463. The reversal of 478688250440 is 44052886874.

It can be written as a sum of positive squares in 4 ways, for example, as 253365249316 + 225323001124 = 503354^2 + 474682^2 .

It is a super-2 number, since 2×478688250440² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3631772 + ... + 3761268.

Almost surely, 2^478688250440 is an apocalyptic number.

478688250440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

478688250440 is an abundant number, since it is smaller than the sum of its proper divisors (598380285040).

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

478688250440 is a wasteful number, since it uses less digits than its factorization.

478688250440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221921 (or 221917 counting only the distinct ones).

The product of its (nonzero) digits is 13762560, while the sum is 56.

The spelling of 478688250440 in words is "four hundred seventy-eight billion, six hundred eighty-eight million, two hundred fifty thousand, four hundred forty".