478838600840 has 64 divisors (see below), whose sum is σ = 1143695732400. Its totient is φ = 179805134848.

The previous prime is 478838600813. The next prime is 478838600861. The reversal of 478838600840 is 48006838874.

It can be written as a sum of positive squares in 8 ways, for example, as 230190767524 + 248647833316 = 479782^2 + 498646^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640589 + ... + 1169628.

Almost surely, 2^478838600840 is an apocalyptic number.

478838600840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

478838600840 is an abundant number, since it is smaller than the sum of its proper divisors (664857131560).

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

478838600840 is a wasteful number, since it uses less digits than its factorization.

478838600840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810634 (or 1810630 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 56.

The spelling of 478838600840 in words is "four hundred seventy-eight billion, eight hundred thirty-eight million, six hundred thousand, eight hundred forty".