64334820 has 96 divisors (see below), whose sum is σ = 198567936. Its totient is φ = 15433600.

The previous prime is 64334819. The next prime is 64334843. The reversal of 64334820 is 2843346.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 70165 + ... + 71075.

It is an arithmetic number, because the mean of its divisors is an integer number (2068416).

Almost surely, 2^64334820 is an apocalyptic number.

64334820 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 64334820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99283968).

64334820 is an abundant number, since it is smaller than the sum of its proper divisors (134233116).

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

64334820 is a wasteful number, since it uses less digits than its factorization.

64334820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1039 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 64334820 is about 8020.8989521125. The cubic root of 64334820 is about 400.6963287788.

The spelling of 64334820 in words is "sixty-four million, three hundred thirty-four thousand, eight hundred twenty".