64478700 has 288 divisors, whose sum is σ = 244984320. Its totient is φ = 14342400.

The previous prime is 64478699. The next prime is 64478717. The reversal of 64478700 is 787446.

It is a happy number.

64478700 is a `hidden beast` number, since 644 + 7 + 8 + 7 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 386017 + ... + 386183.

It is an arithmetic number, because the mean of its divisors is an integer number (850640).

Almost surely, 2^64478700 is an apocalyptic number.

64478700 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 64478700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122492160).

64478700 is an abundant number, since it is smaller than the sum of its proper divisors (180505620).

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

64478700 is a wasteful number, since it uses less digits than its factorization.

64478700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 64478700 is about 8029.8630125302. The cubic root of 64478700 is about 400.9948154710.

The spelling of 64478700 in words is "sixty-four million, four hundred seventy-eight thousand, seven hundred".