65450490 has 64 divisors (see below), whose sum is σ = 180437760. Its totient is φ = 14883840.

The previous prime is 65450471. The next prime is 65450501. The reversal of 65450490 is 9405456.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47410 + ... + 48770.

It is an arithmetic number, because the mean of its divisors is an integer number (2819340).

Almost surely, 2^65450490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65450490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90218880).

65450490 is an abundant number, since it is smaller than the sum of its proper divisors (114987270).

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

65450490 is a wasteful number, since it uses less digits than its factorization.

65450490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 65450490 is about 8090.1477118777. The cubic root of 65450490 is about 402.9993083294. Note that the first 3 decimals are identical.

The spelling of 65450490 in words is "sixty-five million, four hundred fifty thousand, four hundred ninety".