478181780 has 24 divisors (see below), whose sum is σ = 1063252008. Its totient is φ = 180021248.

The previous prime is 478181771. The next prime is 478181819. The reversal of 478181780 is 87181874.

It can be written as a sum of positive squares in 4 ways, for example, as 88435216 + 389746564 = 9404^2 + 19742^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702869 + ... + 703548.

It is an arithmetic number, because the mean of its divisors is an integer number (44302167).

Almost surely, 2^478181780 is an apocalyptic number.

It is an amenable number.

478181780 is an abundant number, since it is smaller than the sum of its proper divisors (585070228).

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

478181780 is a wasteful number, since it uses less digits than its factorization.

478181780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406443 (or 1406441 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 44.

The square root of 478181780 is about 21867.3679257473. The cubic root of 478181780 is about 781.9836536114.

The spelling of 478181780 in words is "four hundred seventy-eight million, one hundred eighty-one thousand, seven hundred eighty".