63878520 has 128 divisors (see below), whose sum is σ = 205208640. Its totient is φ = 15851520.

The previous prime is 63878519. The next prime is 63878557. The reversal of 63878520 is 2587836.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 352830 + ... + 353010.

Almost surely, 2^63878520 is an apocalyptic number.

63878520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63878520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102604320).

63878520 is an abundant number, since it is smaller than the sum of its proper divisors (141330120).

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

63878520 is a wasteful number, since it uses less digits than its factorization.

63878520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 63878520 is about 7992.4038936981. The cubic root of 63878520 is about 399.7467563697.

The spelling of 63878520 in words is "sixty-three million, eight hundred seventy-eight thousand, five hundred twenty".