64489536 has 84 divisors (see below), whose sum is σ = 186813952. Its totient is φ = 21268224.

The previous prime is 64489531. The next prime is 64489549. The reversal of 64489536 is 63598446.

It is a junction number, because it is equal to n+sod(n) for n = 64489491 and 64489500.

It is not an unprimeable number, because it can be changed into a prime (64489531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58785 + ... + 59871.

Almost surely, 2^64489536 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 64489536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93406976).

64489536 is an abundant number, since it is smaller than the sum of its proper divisors (122324416).

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

64489536 is a wasteful number, since it uses less digits than its factorization.

64489536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208 (or 1195 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 64489536 is about 8030.5377154958. The cubic root of 64489536 is about 401.0172773405.

It can be divided in two parts, 64489 and 536, that added together give a square (65025 = 255²).

The spelling of 64489536 in words is "sixty-four million, four hundred eighty-nine thousand, five hundred thirty-six".