478840 has 16 divisors (see below), whose sum is σ = 1077480. Its totient is φ = 191520.

The previous prime is 478831. The next prime is 478843. The reversal of 478840 is 48874.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478843) by changing a digit.

478840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5946 + ... + 6025.

2⁴⁷⁸⁸⁴⁰ is an apocalyptic number.

478840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

478840 is an abundant number, since it is smaller than the sum of its proper divisors (598640).

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

478840 is a wasteful number, since it uses less digits than its factorization.

478840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11982 (or 11978 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 478840 is about 691.9826587423. The cubic root of 478840 is about 78.2342290788.

The spelling of 478840 in words is "four hundred seventy-eight thousand, eight hundred forty".