478485840 has 80 divisors (see below), whose sum is σ = 1695212928. Its totient is φ = 109367808.

The previous prime is 478485781. The next prime is 478485841. The reversal of 478485840 is 48584874.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 478485840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478485841) 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, 140727 + ... + 144086.

Almost surely, 2^478485840 is an apocalyptic number.

478485840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

478485840 is an abundant number, since it is smaller than the sum of its proper divisors (1216727088).

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

478485840 is a wasteful number, since it uses less digits than its factorization.

478485840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284836 (or 284830 counting only the distinct ones).

The product of its (nonzero) digits is 1146880, while the sum is 48.

The square root of 478485840 is about 21874.3191894056. The cubic root of 478485840 is about 782.1493643521.

The spelling of 478485840 in words is "four hundred seventy-eight million, four hundred eighty-five thousand, eight hundred forty".