64533090 has 32 divisors (see below), whose sum is σ = 155131200. Its totient is φ = 17180864.

The previous prime is 64533047. The next prime is 64533097. The reversal of 64533090 is 9033546.

It is a happy number.

64533090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (64533097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22561 + ... + 25259.

It is an arithmetic number, because the mean of its divisors is an integer number (4847850).

Almost surely, 2^64533090 is an apocalyptic number.

64533090 is an abundant number, since it is smaller than the sum of its proper divisors (90598110).

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

64533090 is a wasteful number, since it uses less digits than its factorization.

64533090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 64533090 is about 8033.2490313696. The cubic root of 64533090 is about 401.1075347533.

The spelling of 64533090 in words is "sixty-four million, five hundred thirty-three thousand, ninety".