64724652 has 72 divisors (see below), whose sum is σ = 171924480. Its totient is φ = 20504160.

The previous prime is 64724641. The next prime is 64724657. The reversal of 64724652 is 25642746.

64724652 is a `hidden beast` number, since 647 + 2 + 4 + 6 + 5 + 2 = 666.

It is a super-2 number, since 2×64724652² = 8378561153042208, which contains 22 as substring.

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 (64724657) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 65353 + ... + 66335.

It is an arithmetic number, because the mean of its divisors is an integer number (2387840).

Almost surely, 2^64724652 is an apocalyptic number.

64724652 is a gapful number since it is divisible by the number (62) 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 64724652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85962240).

64724652 is an abundant number, since it is smaller than the sum of its proper divisors (107199828).

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

64724652 is a wasteful number, since it uses less digits than its factorization.

64724652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 1078 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 64724652 is about 8045.1632674546. The cubic root of 64724652 is about 401.5040293181.

The spelling of 64724652 in words is "sixty-four million, seven hundred twenty-four thousand, six hundred fifty-two".