64523028 has 48 divisors (see below), whose sum is σ = 160796160. Its totient is φ = 20092800.

The previous prime is 64523009. The next prime is 64523029. The reversal of 64523028 is 82032546.

It is a super-2 number, since 2×64523028² = 8326442284577568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64522986 and 64523004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64523029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7798 + ... + 13778.

It is an arithmetic number, because the mean of its divisors is an integer number (3349920).

Almost surely, 2^64523028 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 64523028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80398080).

64523028 is an abundant number, since it is smaller than the sum of its proper divisors (96273132).

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

64523028 is a wasteful number, since it uses less digits than its factorization.

64523028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048 (or 6046 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 64523028 is about 8032.6227348233. The cubic root of 64523028 is about 401.0866867729.

The spelling of 64523028 in words is "sixty-four million, five hundred twenty-three thousand, twenty-eight".