64863378 has 48 divisors (see below), whose sum is σ = 149666400. Its totient is φ = 20243520.

The previous prime is 64863371. The next prime is 64863389. The reversal of 64863378 is 87336846.

64863378 is a `hidden beast` number, since 6 + 4 + 8 + 633 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (64863371) 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, 29373 + ... + 31503.

It is an arithmetic number, because the mean of its divisors is an integer number (3118050).

Almost surely, 2^64863378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64863378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74833200).

64863378 is an abundant number, since it is smaller than the sum of its proper divisors (84803022).

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

64863378 is a wasteful number, since it uses less digits than its factorization.

64863378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2247 (or 2244 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 64863378 is about 8053.7803545913. The cubic root of 64863378 is about 401.7906759040.

The spelling of 64863378 in words is "sixty-four million, eight hundred sixty-three thousand, three hundred seventy-eight".