64503090 has 48 divisors (see below), whose sum is σ = 169019136. Its totient is φ = 17066400.

The previous prime is 64503077. The next prime is 64503097. The reversal of 64503090 is 9030546.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64503097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9055 + ... + 14525.

It is an arithmetic number, because the mean of its divisors is an integer number (3521232).

Almost surely, 2^64503090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64503090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84509568).

64503090 is an abundant number, since it is smaller than the sum of its proper divisors (104516046).

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

64503090 is a wasteful number, since it uses less digits than its factorization.

64503090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5615 (or 5612 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 64503090 is about 8031.3815747977. The cubic root of 64503090 is about 401.0453697917.

The spelling of 64503090 in words is "sixty-four million, five hundred three thousand, ninety".