78303522 has 64 divisors (see below), whose sum is σ = 184343040. Its totient is φ = 21916800.

The previous prime is 78303493. The next prime is 78303527. The reversal of 78303522 is 22530387.

It is a super-2 number, since 2×78303522² = 12262883115208968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78303522.

It is not an unprimeable number, because it can be changed into a prime (78303527) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 50653 + ... + 52175.

It is an arithmetic number, because the mean of its divisors is an integer number (2880360).

Almost surely, 2^78303522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78303522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92171520).

78303522 is an abundant number, since it is smaller than the sum of its proper divisors (106039518).

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

78303522 is a wasteful number, since it uses less digits than its factorization.

78303522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 78303522 is about 8848.9277316520. The cubic root of 78303522 is about 427.8193585088.

The spelling of 78303522 in words is "seventy-eight million, three hundred three thousand, five hundred twenty-two".