63478240 has 144 divisors (see below), whose sum is σ = 182038752. Its totient is φ = 20487168.

The previous prime is 63478213. The next prime is 63478241. The reversal of 63478240 is 4287436.

It is a junction number, because it is equal to n+sod(n) for n = 63478196 and 63478205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63478241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404242 + ... + 404398.

It is an arithmetic number, because the mean of its divisors is an integer number (1264158).

Almost surely, 2^63478240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63478240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91019376).

63478240 is an abundant number, since it is smaller than the sum of its proper divisors (118560512).

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

63478240 is a wasteful number, since it uses less digits than its factorization.

63478240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 63478240 is about 7967.3232644345. The cubic root of 63478240 is about 398.9100326255.

The spelling of 63478240 in words is "sixty-three million, four hundred seventy-eight thousand, two hundred forty".