64990002 has 128 divisors (see below), whose sum is σ = 171859968. Its totient is φ = 15897600.

The previous prime is 64989989. The next prime is 64990021. The reversal of 64990002 is 20009946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 890238 + ... + 890310.

It is an arithmetic number, because the mean of its divisors is an integer number (1342656).

Almost surely, 2^64990002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64990002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85929984).

64990002 is an abundant number, since it is smaller than the sum of its proper divisors (106869966).

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

64990002 is a wasteful number, since it uses less digits than its factorization.

64990002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 64990002 is about 8061.6376748152. The cubic root of 64990002 is about 402.0519598192.

Adding to 64990002 its reverse (20009946), we get a palindrome (84999948).

The spelling of 64990002 in words is "sixty-four million, nine hundred ninety thousand, two".