64529020 has 24 divisors (see below), whose sum is σ = 135672768. Its totient is φ = 25780800.

The previous prime is 64528987. The next prime is 64529021. The reversal of 64529020 is 2092546.

It is a self number, because there is not a number n which added to its sum of digits gives 64529020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64529021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23310 + ... + 25930.

It is an arithmetic number, because the mean of its divisors is an integer number (5653032).

Almost surely, 2^64529020 is an apocalyptic number.

It is an amenable number.

64529020 is an abundant number, since it is smaller than the sum of its proper divisors (71143748).

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

64529020 is a wasteful number, since it uses less digits than its factorization.

64529020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861 (or 3859 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 64529020 is about 8032.9957052148. The cubic root of 64529020 is about 401.0991021699.

The spelling of 64529020 in words is "sixty-four million, five hundred twenty-nine thousand, twenty".