64820000 has 120 divisors (see below), whose sum is σ = 182641536. Its totient is φ = 22176000.

The previous prime is 64819999. The next prime is 64820023. The reversal of 64820000 is 2846.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 139769 + ... + 140231.

Almost surely, 2^64820000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64820000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91320768).

64820000 is an abundant number, since it is smaller than the sum of its proper divisors (117821536).

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

64820000 is an equidigital number, since it uses as much as digits as its factorization.

64820000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 64820000 is about 8051.0868831481. The cubic root of 64820000 is about 401.7010888203.

Adding to 64820000 its reverse (2846), we get a palindrome (64822846).

It can be divided in two parts, 648 and 20000, that multiplied together give a 4-th power (12960000 = 60⁴).

The spelling of 64820000 in words is "sixty-four million, eight hundred twenty thousand".