64835820 has 108 divisors (see below), whose sum is σ = 228808944. Its totient is φ = 14817600.

The previous prime is 64835791. The next prime is 64835821. The reversal of 64835820 is 2853846.

64835820 is a `hidden beast` number, since 648 + 3 + 5 + 8 + 2 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (64835821) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5145 + ... + 12495.

Almost surely, 2^64835820 is an apocalyptic number.

64835820 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 64835820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114404472).

64835820 is an abundant number, since it is smaller than the sum of its proper divisors (163973124).

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

64835820 is a wasteful number, since it uses less digits than its factorization.

64835820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7380 (or 7368 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 64835820 is about 8052.0692992547. The cubic root of 64835820 is about 401.7337659483.

The spelling of 64835820 in words is "sixty-four million, eight hundred thirty-five thousand, eight hundred twenty".