64491282 has 64 divisors (see below), whose sum is σ = 152064000. Its totient is φ = 20203344.

The previous prime is 64491281. The next prime is 64491283. The reversal of 64491282 is 28219446.

64491282 is a `hidden beast` number, since 644 + 9 + 1 + 2 + 8 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (64491281) and next prime (64491283).

It is a super-3 number, since 3×64491282³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (64491281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 245083 + ... + 245345.

It is an arithmetic number, because the mean of its divisors is an integer number (2376000).

Almost surely, 2^64491282 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64491282, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76032000).

64491282 is an abundant number, since it is smaller than the sum of its proper divisors (87572718).

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

64491282 is a wasteful number, since it uses less digits than its factorization.

64491282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 526 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 64491282 is about 8030.6464247905. The cubic root of 64491282 is about 401.0208963765.

The spelling of 64491282 in words is "sixty-four million, four hundred ninety-one thousand, two hundred eighty-two".