65333280 has 48 divisors (see below), whose sum is σ = 205801344. Its totient is φ = 17422080.

The previous prime is 65333263. The next prime is 65333291. The reversal of 65333280 is 8233356.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67576 + ... + 68535.

It is an arithmetic number, because the mean of its divisors is an integer number (4287528).

Almost surely, 2^65333280 is an apocalyptic number.

65333280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65333280 is an abundant number, since it is smaller than the sum of its proper divisors (140468064).

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

65333280 is a wasteful number, since it uses less digits than its factorization.

65333280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136129 (or 136121 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 65333280 is about 8082.9004695097. The cubic root of 65333280 is about 402.7585982711.

It can be divided in two parts, 653 and 33280, that added together give a palindrome (33933).

The spelling of 65333280 in words is "sixty-five million, three hundred thirty-three thousand, two hundred eighty".