64478970 has 64 divisors (see below), whose sum is σ = 181008000. Its totient is φ = 16288128.

The previous prime is 64478969. The next prime is 64478983. The reversal of 64478970 is 7987446.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 1155 + ... + 11414.

It is an arithmetic number, because the mean of its divisors is an integer number (2828250).

Almost surely, 2^64478970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64478970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90504000).

64478970 is an abundant number, since it is smaller than the sum of its proper divisors (116529030).

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

64478970 is a wasteful number, since it uses less digits than its factorization.

64478970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12604 (or 12598 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 64478970 is about 8029.8798247545. The cubic root of 64478970 is about 400.9953751827.

The spelling of 64478970 in words is "sixty-four million, four hundred seventy-eight thousand, nine hundred seventy".