63478420 has 24 divisors (see below), whose sum is σ = 133668864. Its totient is φ = 25322016.

The previous prime is 63478417. The next prime is 63478423. The reversal of 63478420 is 2487436.

It is an interprime number because it is at equal distance from previous prime (63478417) and next prime (63478423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63478423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3517 + ... + 11803.

It is an arithmetic number, because the mean of its divisors is an integer number (5569536).

Almost surely, 2^63478420 is an apocalyptic number.

It is an amenable number.

63478420 is an abundant number, since it is smaller than the sum of its proper divisors (70190444).

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

63478420 is a wasteful number, since it uses less digits than its factorization.

63478420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8679 (or 8677 counting only the distinct ones).

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

The square root of 63478420 is about 7967.3345605667. The cubic root of 63478420 is about 398.9104096773.

The spelling of 63478420 in words is "sixty-three million, four hundred seventy-eight thousand, four hundred twenty".